Sophia Learning
Sophia: Scalene, Isosceles, and Equilateral Triangles
Explore scalene, isosceles, and equilateral triangles and how to determine which is which. Assess learning with a quiz.
Sophia Learning
Sophia: Scalene, Isosceles, and Equilateral Triangle
Explore types of triangles including scalene, isosceles, and equilateral in this video tutorial. [3:47] Quiz to follow to check understanding.
Sophia Learning
Sophia: Scalene, Isosceles, and Equilateral Triangles
This video lesson [2:10] shows examples for classifying triangles by their side lengths. Students can check their understanding with an assessment.
Sophia Learning
Sophia: Solving for Unknown Sides of Similar Triangles
Solve for unknown sides of similar triangles and take a quiz to assess learning.
Math Mammoth
Math Mammoth: Acute, Obtuse, and Right Triangles
This lesson goes over the types of triangles. [7:02]
Khan Academy
Khan Academy: Triangles: Another Isosceles Example Problem
Review possible angles for an isosceles triangle in this short video.
Khan Academy
Khan Academy: Classifying Triangles by Angles
You say you can't categorize a triangle because you don't know the length of the sides. Guess what? If you know the size of the angles you can!
Sophia Learning
Sophia: Equilateral Triangle Interior Angles Practice Problems: Lesson 4
This lesson will provide practice problems that involve solving for unknown angle and side measures of equilateral triangles. It is 4 of 5 in the series titled "Equilateral Triangle Interior Angles Practice Problems."
Sophia Learning
Sophia: Solve for an Angle of an Isosceles Triangle: Lesson 3
Given the value of one angle in an isosceles triangle in this lesson, you'll be able to solve for the value of either one of the missing angles, as long as you know which two interior angles are congruent. It is 3 of 12 in the series...
Sophia Learning
Sophia: Solve for an Angle of an Isosceles Triangle: Lesson 8
Given the value of one angle in an isosceles triangle in this lesson, you'll be able to solve for the value of either one of the missing angles, as long as you know which two interior angles are congruent. It is 8 of 12 in the series...
Sophia Learning
Sophia: Solve for an Angle of an Isosceles Triangle: Lesson 1
Given the value of one angle in an isosceles triangle in this lesson, you'll be able to solve for the value of either one of the missing angles, as long as you know which two interior angles are congruent. It is 1 of 12 in the series...
Sophia Learning
Sophia: Triangle Angle Combinations: Lesson 4
This lesson explains how you can have 3 acute angles, 1 obtuse and 2 acute angles or 1 right and 2 acute angles in a triangle. It is 4 of 7 in the series titled "Triangle Angle Combinations."
Sophia Learning
Sophia: Triangle Angle Combinations: Lesson 1
This lesson explains how you can have 3 acute angles, 1 obtuse and 2 acute angles or 1 right and 2 acute angles in a triangle. It is 1 of 7 in the series titled "Triangle Angle Combinations."
Sophia Learning
Sophia: Triangle Notation: Lesson 5
Following this lesson, you'll be able to name a triangle based on the three vertices and the triangle symbol. It is 5 of 6 in the series titled "Triangle Notation."
Sophia Learning
Sophia: Triangle Notation: Lesson 1
Following this lesson, you'll be able to name a triangle based on the three vertices and the triangle symbol. It is 1 of 6 in the series titled "Triangle Notation."
Sophia Learning
Sophia: Using Similar Triangles to Make Indirect Measurements
This lesson explains why similar triangles can be used to make indirect measurements, and provides an example.
Sophia Learning
Sophia: Equilateral Triangle Interior Angles Practice Problems: Lesson 2
This lesson will provide practice problems that involve solving for unknown angle and side measures of equilateral triangles. It is 2 of 5 in the series titled "Equilateral Triangle Interior Angles Practice Problems."
Sophia Learning
Sophia: Equilateral Triangle Interior Angles Practice Problems: Lesson 3
This lesson will provide practice problems that involve solving for unknown angle and side measures of equilateral triangles. It is 3 of 5 in the series titled "Equilateral Triangle Interior Angles Practice Problems."
Sophia Learning
Sophia: Solve for an Angle of an Isosceles Triangle: Lesson 6
Given the value of one angle in an isosceles triangle in this lesson, you'll be able to solve for the value of either one of the missing angles, as long as you know which two interior angles are congruent. It is 6 of 12 in the series...
Sophia Learning
Sophia: Triangle Notation: Lesson 2
Following this lesson, you'll be able to name a triangle based on the three vertices and the triangle symbol. It is 2 of 6 in the series titled "Triangle Notation."
Shmoop University
Shmoop: Triangles
A video clip [2:09] using an everyday bag of chips to explain the different types of triangles.