Perimeter and Area

Introduction to Perimeter and Perimeter Formulas

Determine the Perimeter of Various Polygons

The Circumference of a Circle

Introduction to Area

Introduction to Area and Area Formulas

Find the Area of a Shape by Decomposing the Area

Area of a Square and Rectangle Using Decimal

Area and Perimeter Formulas

Determine the Perimeter and Area of a Square on a Grid

Determine the Perimeter and Area of a Rectangle on a Grid

Determine the Area of a Parallelogram on a Grid

Determine the Area of a Trapezoid on a Grid

Rectangle Area Application: Flooring

Perimeter and Area of a Rectangle with Decimals

Ex: Determine the Area of a Rectangle Involving Whole Numbers

Ex: Find the Area of a Triangle (Whole Number)

Ex: Area of a Parallelogram (Whole Numbers)

Perimeter and Area of a Parallelogram (Whole Numbers)

Perimeter and Area of a Parallelogram (Decimals)

Ex: Area of a Trapezoid Using Whole Numbers

Determine the Perimeter and Area of a Trapezoid

Perimeter and Area of a Right Trapezoid

Determine the Area of a Triangle on a Grid

Determine the Area of an Obtuse Triangle on a Grid

Perimeter and Area of a Triangle with Decimals

Perimeter and Area of a Triangle with Mixed Numbers

Find the Length of a Missing Side of a Right Triangle and Perimeter and Area

Perimeter and Area of a Trapezoid with Decimals

Determine the Perimeter and Area of an Irregular Polygon

Find the Perimeter and Area of a L-Shaped Polygon Using Decimals

Ex: Find the Area of an L-Shaped Polygon Involving Whole Numbers

Ex: Area of a Triangle (Whole Numbers)

Ex: Find the Area of a Rectangle Given the Perimeter

Ex: Area of a Trapezoid Using Mixed Numbers

Ex: Determine the Area of a Rectangle Using Decimals

Ex: Determine the Area of an L-shaped Polygon Using Decimals

Ex: Determine the Area of a Rectangle Using Mixed Numbers

Ex: Area of a Walkway Around a Rectangle

Ex: Area of a Triangle Involving Fractions

Where Does the Area Formula For a Circle Come From?

Ex: Determine the Area of a Circle

Ex: Find the Area of a Ring or Area Between Two Circles

Ex: Determine an Area Involving a Rectangle and Circle

Ex: Find the Interior Angles of a Triangle From Expressions For the Angles

Ex: Find the Perimeter of an L-shaped Polygon Involving Whole Numbers

Ex: Find the Area of a Rectangle Given the Perimeter

Ex: Using Decimals To Determine the Perimeter of a L-shaped Polygon

Ex: Determine the Perimeter of a Rectangle using Mixed Numbers

Ex: Determine the Circumference of a Circle

Area of a Circle Given the Diameter as a Decimal

Ex: Determine Perimeter Involving a Rectangle and Circle

Find the Area Inside a Square and Outside a Circle

Ex: Area of a Polygon by Decomposing Area (Triangle/Rectangle I)

Ex: Area of a Polygon by Decomposing Area (Triangle/Rectangle II)

Find the Area of an Irregular Shape (Semi Circle Plus Triangle)

Perimeter of a Rhombus Inscribed in a Rectangle Inscribed in a Circle

Ex: Determine the Length of a Missing Side Given the Perimeter

Volume / Surface Area / Misc

Introduction to Volume (1)

Introduction to Volume (2)

Determine the Volume of a Rectangular Prism (Whole Numbers)

Determine the Volume of a Cube (Decimals)

Volume of Stairs: Decomposing Volume (Right Rectangular Prisms)

Ex: Determine Volume of a Cone

Ex: Find the Surface Area of an Open Top Box

Find the Area of an Open Top Box

Ex: Volume of Pyramid

Find the Volume of a Cylinder

Volume of a Cylinder and a Pyramid

Find the Volume of a Sphere

Volume Between Two Spheres

Volume of the Empty Space in a Cubic Box with a Ball Inside

Determine the Percent of Volume of a Rectangular Pool (Box)

Will It Fit? Water Bottles and Volume of a Cylinder

Ex: Find the Volume of a Sphere When the Radius is a Fraction with a Radical

Ex: Determine the Surface Area of a Box (Right Rectangular Prism)

Determine the Surface Area of a Rectangular Prism (Whole Numbers)

Ex: Find the Surface Area of an Open Top Box

Find the Surface Area of an Open Top Box

Determine the Surface Area of a Cube (Decimals)

Find the surface Area of a Cylinder

Find the Surface Area of a Sphere

Geometric Applications

Ex: Builder's Level Application - Decimal Addition and Subtraction

Ex: Perimeter Application - Linear Feet of Baseboard Needed for a Room

Rectangle Perimeter Application: Feet of Fencing Required

Perimeter Application: Perimeter With and Without Edge

Circumference Application: Determine the Radius

Ex: Area Application - Area of an Inner Room with a Outer Footing

Application: Find the Radius of a Circle Given the Area

Introduction to Geometry Basics: Points, Lines, Segments, Planes, Angles, and Polygons

Points, Line, and Planes

Identify and Name a Point, Line, Ray, Segment, and Angle

Determine if a Measurement is 1D, 2D, or 3D

Ruler Postulate and the Segment Addition Postulate

Determine Lengths in Centimeters, Millimeters, and Inches

Segment Midpoint and Segment Perpendicular Bisector

Angle Basics

Name and Classify Types of Angles

Animation: Types of Angles

Animation: Measuring Angles with a Protractor

Angle Relationships and Types of Triangles

Determine the Measure of Missing Angles from a Figure

Name Types of Triangles and Determine a Missing Interior Angle

Introduction to Polygons

Classifying Polygons

Interior and Exterior Angles of a Polygon

Properties of Polygons and Quadrilaterals

Introduction to Similarity

Similar Triangles and Polygons

Congruent and Similar Triangles

Discover the Ratios of Sides, Perimeters, and Areas of Similar Polygons

Similar Polygons: Find Missing Area Given the Ratio of Perimeters

Similar Polygons: Find Missing Perimeter Given the Ratio of Areas

Scale Factor, Similar Triangles, and Proportions

Sketch a Similar Polygon Using a Scale Factor of 3

The Pythagorean Theorem

The Pythagorean Theorem and the Converse of the Pythagorean Theorem

Using the Pythagorean to Determine the Length of the Hypotenuse

Solve Applications Using the Pythagorean Theorem (c only)

Animation: The Sum of the Interior Angles of a Triangle

Ex 2B: Find the Measure of an Interior Angle of a Triangle

Ex: Find the Interior Angles of a Triangle From Expressions For the Angles

Complementary, Supplementary, and Vertical Angles

Determine the Complement and Supplement of a Given Angle

Determine the Measure of Vertical Angles and Angles from a Figure

Ex: Write an Expressions for Complementary Angles and Supplementary Angles (Basic)

Ex: Write Expressions and Determine the Measure of Complementary Angles

Ex: Write Expressions and Determine the Measure of Supplementary Angles

Angle Bisector

Bisector and Midpoint Exercises - Example 1

Bisector and Midpoint Exercises - Example 2

Ex: Midpoint of a Segment

Ex: Find the Endpoint of a Segment Given the Midpoint and One Endpoint

Introduction to Proof

Inductive Reasoning

Introduction to Deductive Reasoning

Introduction to Proof Using Properties of Equality

Introduction to Proof Using Properties of Congruence

Parallel and Perpendicular Lines

Parallel and Perpendicular Lines and Planes

Parallel Line Postulate

Perpendicular Line Postulate

Angles and Transversals

Properties of Parallel Lines

Proof: Alternate Interior Angles Are Congruent

Proof: Consecutive Interior Angles Are Supplementary

Proof: Parallel Planes Cut by a Plane Forming Parallel Lines

Proof: Two lines Parallel to a Third are Parallel

Example 1: Parallel Line Properties

Example 2: Parallel Line Properties

Proof: Involving Two Pair of Parallel Lines

Parallel Lines Cut by a Transversal

Corresponding Angle Converse

Proof: Alternate Interior Angles Converse

Proof: Alternate Exterior Angles Converse

Proof: Consecutive Interior Angles Converse

Properties ofPerpendicular Lines

Properties of Perpendicular

Lines: Proof 1, Proof 2, Proof 3

Perpendicular Transversals of Parallel Lines

Examples 1: Perpendicular Transversals

Examples 2: Perpendicular Transversals

Perpendicular Bisector of a Segment on the Coordinate Plane

The Distance Formula

Determining the Shortest Distance Between a Line and a Point

Determining the Distance Between Two Parallel Lines

Triangles and Congruence

Proving the Triangle Sum Theorem

Introduction to the Interior and Exterior Angles of a Triangle

Proof: The Sum of the Exterior Angles of a Triangle is 360 Degrees

Proof: The Exterior Angles Theorem

How to Construct an Isosceles Triangle

Proof: The Isosceles Triangle Theorem

Examples: Using the Properties of Isosceles Triangles to Determine Values

Introduction to Congruent Triangles

Hypotenuse - Leg Congruence Theorem

Determining If Two Triangles are Congruent

Example 1: Prove Two Triangles are Congruent

Example 2: Prove Two Triangles are Congruent

How to Construct an Equilateral Triangle

Proof: The Equilateral Triangle Theorem

Examples: Using the Properties of Equilateral Triangles to Determine Values

Relationships with Triangles

Introduction to the Midsegments of a Triangle

Examples: Determining Unknown Values Using Properties of the Midsegment of a Triangle

Introduction and Construction of the Perpendicular Bisectors of the Sides of a Triangle

Proof: Perpendicular Bisector Theorem

Proof: Perpendicular Bisector Theorem Converse

Examples: Determining Values Using the Properties of the Perpendicular Bisectors of a Triangle

Constructing a Perpendicular Bisector Using Geometer's Sketchpad

Introduction to Angle Bisectors of a Triangle

Proof: The Angle Bisector Theorem

Proof: The Angle Bisector Theorem Converse

Constructing the Angle Bisectors of a Triangle

Constructing an Angle Bisector Using Geometer's Sketchpad

Examples: Solving For Unknown Values Using Properties of Angle Bisectors

The Medians of a Triangle

Examples: Using the Properties of the Medians of a Triangle to Solve for Unknown Values

The Altitudes of a Triangle

Constructing the Altitude of a Triangle

Constructing the Altitude of a Triangle Using Geometer's Sketchpad

Proof: The Angle of a Triangle Opposite the Longest Side is the Largest Angle

Triangle Inequality Theorem

Introduction to Indirect Proof

Similarity

Ratios

Rates and Unit Rates

Proportions

Unit Scale

Scale Factor

Scale Factor, Similar Triangles, and Proportions

Sketch a Similar Polygon Using a Scale Factor of 3

Similar Triangles Using Angle-Angle

Similar Triangles Using Side-Side-Side and Side-Angle-Side

Indirect Measurement Using Similar Triangles

Solving for Unknown Values Using the Properties of Similar Triangles

The Triangle Proportionality Theorem

Using the Properties of the Triangle Proportionality Theorem to Solve for Unknown Values

The Triangle Angle Bisector Theorem

Using the Properties of the Triangle Angle Bisector Theorem to Determine Unknown Values

Circles

Introduction to Circles

Circles and Solids: Radius, Diameter, and Naming Solids

Ex: Write the Standard Form of a Circle From a Graph

Ex: Graph a Circle in Standard Form

Ex 1: Write the General Equation of a Circle in Standard Form

Ex 2: Write the General Equation of a Circle in Standard Form (Fractions)

Ex 3: Write General Equation of a Circle in Standard Form (Coefficent Not 1)

Ex 4: Write General Equation of a Circle in Standard Form (Coefficent Not 1 and Fractions)

Ex: Find Standard Equation of a Circle Given Center and Point on the Circle

Ex 1: Find Standard Equation of a Circle Given the Endpoints of a Diameter

Ex 2: Find Standard Equation of a Circle Given the Endpoints of a Diameter

Tangent Lines to a Circle Proof

Tangent Lines to a Circle Example Problems

Prove Tangents Segments to a Circle from a Point are Congruent

Tangent Segments to a Circle Example Problems

Logic

If-Then Statements and Converses

The Converse, Contrapositive, and Inverse of an If-Then Statement

Truth Tables for Compound Statements

Truth Tables for Conditional Statements

Truth Table for the Biconditional Statement

Truth Tables: Showing Statements are Equivalent