Student Tutorial: Geometry Basics: Classifying Triangles by Side Length

Instructions:

Learn about classifying triangles by their sides. For this tutorial you'll be using the Desmos Geometry Tools, which are free: https://www.desmos.com/geometry. Watch the video and follow along using the Desmos tools.

Click the arrows on the bottom to get started

Math Clip Art: Student Tutorial Title Page

Incenter of a Triangle. Where the angle bisectors of a triangle intersect. It also is the center of an inscribed circle

Isosceles Triangle. A triangle with two congruent sides and congruent base angles.

Equilateral Triangle. A triangle with three congruent sides and three congruent interior angles.

Classifying Triangles by Sides Title Card

A triangle includes three sides of specific lengths.

A Scalene Triangle consists of three sides of different lengths.

An Isosceles Triangle has two sides that are congruent.

An Equilateral Triangle has all three sides congruent.

An Isosceles Triangle has two congruent acute angles.

Triangles Classified by Angles and Sides

An Example of an Acute Scalene Triangle

An Example of an Obtuse Scalene Tringle

An Example of a Right Scalene Triangle

An Example of an Acute Isosceles Triangle

An Example of an Obtuse Isosceles Triangle

An Example of an Isosceles Right Triangle

An Example of an Acute Equilateral Triangle

Triangles Classified by Angles and Sides