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Geometry

What is a counterexample to disprove the conjecture, "All triangles are right triangles

Elementary Geometry for College Students

6th Edition

ISBN:9781285195698

Author:Daniel C. Alexander, Geralyn M. Koeberlein

Publisher:Daniel C. Alexander, Geralyn M. Koeberlein

Chapter7: Locus And Concurrence

Section7.2: Concurrence Of Lines

Problem 5E

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What is a counterexample to disprove the conjecture, "All triangles are right triangles."

Polygon with three sides, three angles, and three vertices. Based on the properties of each side, the types of triangles are scalene (triangle with three three different lengths and three different angles), isosceles (angle with two equal sides and two equal angles), and equilateral (three equal sides and three angles of 60°). The types of angles are acute (less than 90°); obtuse (greater than 90°); and right (90°).

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