Question

Please help

Given <triangle> ABC is congruent to <triangle> XYZ, and m< A is 50°, m<Z is 40°, what is the m<B

90°
80°
70°
60°​

Answer 1

90°

Explanation:

Since triangles ABC and XYZ are congruent, the corresponding angles are equal. m<A=50°, m<Z=m<C=40°

In a triangle, all internal angles sum upto 180°

m<A+m<B+m<C = 180°

50°+m<B+40°=180°

m<B=180°-90°=90°