8.8: Triangle Classification Difficulty Level: At Grade Created by: CK-12 Estimated3 minsto complete % Progress Practice Triangle Classification MEMORY METER This indicates how strong in your memory this concept is Practice Progress Estimated3 minsto complete % Estimated3 minsto complete % Practice Now MEMORY METER This indicates how strong in your memory this concept is Share Add to Library Turn In Read Practice Resources Details Loading... Notes/Highlights Having trouble? Report an issue. Color Highlighted Text Notes Show More Vocabulary Language: English ▼ English Acute Triangle An acute triangle has three angles that each measure less than 90 degrees. Congruent Congruent figures are identical in size, shape and measure. Exterior angles An exterior angle is the angle formed by one side of a polygon and the extension of the adjacent side. Interior angles Interior angles are the angles inside a figure. Isosceles Triangle An isosceles triangle is a triangle in which exactly two sides are the same length. Obtuse Triangle An obtuse triangle is a triangle with one angle that is greater than 90 degrees. Right Angle A right angle is an angle equal to 90 degrees. Scalene Triangle A scalene triangle is a triangle in which all three sides are different lengths. Triangle A triangle is a polygon with three sides and three angles. Equilateral A polygon is equilateral if all of its sides are the same length. Equiangular A polygon is equiangular if all angles are the same measure. Image Attributions Show Hide Details Description Discover how to classify triangles. Learning Objectives None Related Materials Classifying Triangles Triangle Classification Triangle Classification Triangles Difficulty Level: At Grade Authors: Jen Kershaw Kimberly Hopkins Tags: acute triangle equiangular triangle equilateral triangle (5 more) isosceles triangle MAT.GEO.340.L.3 obtuse triangle right triangle scalene triangle Subjects: mathematics Geometry Concept Nodes: MAT.GEO.340 (Triangle Classification) Grades: 7 Date Created: Dec 02, 2015 Last Modified: Sep 08, 2016 Vocabulary None Save or share your relevant files like activites, homework and worksheet.To add resources, you must be the owner of the Modality. Click Customize to make your own copy.