8.5: 30-60-90 Right Triangles Difficulty Level: At Grade Created by: CK-12 Estimated5 minsto complete % Progress Practice 30-60-90 Right Triangles MEMORY METER This indicates how strong in your memory this concept is Practice Progress Estimated5 minsto complete % Estimated5 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 30-60-90 Theorem If a triangle has angle measures of 30, 60, and 90 degrees, then the sides are in the ratio x : x : 2x 30-60-90 Triangle A 30-60-90 triangle is a special right triangle with angles of , , and . Hypotenuse The hypotenuse of a right triangle is the longest side of the right triangle. It is across from the right angle. Legs of a Right Triangle The legs of a right triangle are the two shorter sides of the right triangle. Legs are adjacent to the right angle. Pythagorean Theorem The Pythagorean Theorem is a mathematical relationship between the sides of a right triangle, given by , where and are legs of the triangle and is the hypotenuse of the triangle. Radical The , or square root, sign. Image Attributions Show Hide Details Description This concept teaches students about the 30-60-90 special right triangle and how to apply its properties. Learning Objectives None Related Materials 30-60-90 Right Triangles 30-60-90 Triangles Difficulty Level: At Grade Authors: Bill Zahner Lori Jordan Tags: 30-60-90 triangle MAT.GEO.644.L.2 right triangle (1 more) similar Subjects: mathematics Geometry Concept Nodes: MAT.GEO.644 (30-60-90 Right Triangles) Grades: 9 , 10 Date Created: Jul 17, 2012 Last Modified: Oct 05, 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.