Question

In congruent triangles ∆ABC and ∆DEF, ∠A = ∠D= 40 and ∠C =∠F 65, then ∠B =

a)75 Degree
b) 65 Degree
c) 55 Degree

Answer 1

Answer:

b) 75

Step-by-step explanation:

angles in a triangle = 180

Congruent triangles are triangles that have the same size and shape. This means that the corresponding sides are equal and the corresponding angles are equal

i.e. angle A + angle B + angle C =180⁰

let angle B be x

40 + 65 + x = 180⁰

105 + x = 180

x=180-105

x = 75⁰