Question

triángulo a
triángulo b
triángulo c
triángulo d

Explanation:

Step1: Recall triangle classification

A right - angled isosceles triangle (Triangle A) has two equal angles (\(45^{\circ}\) each) and is isosceles. A triangle with two equal sides (Triangle B: sides 8, 8) is isosceles. A triangle with all angles \(60^{\circ}\) (Triangle C) is equilateral. A triangle with all sides of different lengths (Triangle D: sides 4,7,10) is scalene.

Answer:

Triangle A: Isósceles; Triangle B: Isósceles; Triangle C: Equilátero; Triangle D: Escaleno