Question

A. 50
B. 80
C. 100
D. 130

Answer 1

the answer is B

Explanation:

a triangle has an angle of 180°.

so when you want to find A you just need to subtract the angle.

e.g. 180°-50°-50°

=80

Answer 2

B

Explanation:

all triangle have the sum of 180° of its interior angles.

180-50-50

=80