Math Mammoth
Math Mammoth: How to Draw a Right Angle (Perpendicular Line) and a Rectangle
Demonstrates how to draw a right angle and a rectangle. [6:21]
Khan Academy
Khan Academy: Angles: Acute Obtuse and Right Angles
Demonstrates how to find all acute, obtuse, and right angles in a given diagram.
Virtual Nerd
Virtual Nerd: What Is the Pythagorean Theorem?
Video provides an introduction to the Pythagorean theorem and shows how it is used to solve for a missing length on a right triangle. [3:54]
Virtual Nerd
Virtual Nerd: What Are the Legs and Hypotenuse of a Right Triangle?
Features an intoduction to the names for the different parts of a right triangle. [2:13]
Virtual Nerd
Virtual Nerd: How Do You Use Complementary Angles to Find a Missing Angle?
View this tutorial to see how to use what you know about complementary angles to find a missing angle measurement. [3:20]
Virtual Nerd
Virtual Nerd: What Is a Rectangle?
Tutorial provides an introduction to rectangles and explains their special properties. [5:56]
CK-12 Foundation
Ck 12: Elem Math: Overview of Squares and Rectangles
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the properties of squares and rectangles.
Sophia Learning
Sophia: Classifying Quadrilaterals
This video tutorial describes how to classify quadrilaterals using key characteristics such as parallel sides and right angles. [4:27]
Sophia Learning
Sophia: Classifying Triangles by Angle
This video lesson shows examples of classifying triangles by their angle measurements. Students can check their understanding with an assessment. [3:54]
Sophia Learning
Sophia: Number Lines and Coordinate Systems
This video tutorial describes the relationship between number lines and the coordinate plane.
Sophia Learning
Sophia: Rectangle Practice Problems
This video lesson describes the characteristics of rectangles and provides examples of how to find area, perimeter, diagonals, and angle measurements. [7:00]
Sophia Learning
Sophia: Right Angles
Right angles are defined in this video lesson. Take quiz to assess learning. [1:32]
Sophia Learning
Sophia: Square Practice Problems
This video lesson demonstrates how to use the characteristics of a square to find angle measures and side lengths. [4:31]
Art of Problem Solving
Art of Problem Solving: Introduction to Angles
Video tutorial uses examples to provide an introduction to angles including right, acute, and obtuse angles. [8:22]
Math Antics
Math Antics: Angle Basics
Gain a basic understanding of angles by watching this easy to understand video tutorial. Additional resources are available as part of a paid subscription service. [7:46]
Study Pug
Study Pug: Perpendicular Line Proofs
Video lesson explains angles, lines, and transversals. [9:33]
Sophia Learning
Sophia: Right Angle: Lesson 10
This lesson defines the phrase right angle. It is 10 of 14 in the series titled "Right Angle."
Sophia Learning
Sophia: Right Angle: Lesson 11
This lesson defines the phrase right angle. It is 11 of 14 in the series titled "Right Angle."
Sophia Learning
Sophia: Right Angle: Lesson 12
This lesson defines the phrase right angle. It is 12 of 14 in the series titled "Right Angle."
Sophia Learning
Sophia: Right Angle: Lesson 13
This lesson defines the phrase right angle. It is 13 of 14 in the series titled "Right Angle."
Sophia Learning
Sophia: Right Angle: Lesson 9
This lesson defines the phrase right angle. It is 9 of 14 in the series titled "Right Angle."
Sophia Learning
Sophia: Right Angle: Lesson 2
This lesson defines the phrase right angle. It is 2 of 14 in the series titled "Right Angle."
Sophia Learning
Sophia: Right Angle: Lesson 3
This lesson defines the phrase right angle. It is 3 of 14 in the series titled "Right Angle."
Sophia Learning
Sophia: Complementary Angles
Complementary angles are introduced in this video tutorial. [1:18] Students can check their understanding with an assessment.