Question

Gloria is categorizing triangles based on their properties. The side lengths of the triangles are listed below. Triangle 1: 3 cm, 4 cm, 5 cm Triangle 2: 5 cm, 5 cm, 7 cm Triangle 3: 6 cm, 7 cm, 9 cm Triangle 4: 8 cm, 8 cm, 8 cm She places the triangles into 3 different groups: scalene, isosceles, and equilateral. Which pair of triangles would Gloria put in the same group?
A. 1 and 2 B. 1 and 3 C. 2 and 3 D. 2 and 4

Answer 1

B. 1 and 3
Triangle 1 is considered scalene as it has 3 sides all different sizes
And the same applies for triangle 3