Question

find the measure of the third angle of a triangle
1(A=60,(B=60
2A=70,(B=80​

Answer 1

Answer:

1. Measure of angle C. is 60.

2.Measure of angle C is 30.

Explanation:

As we know the measure of a full triangle is 180 degree then,

1. 180-(60+60)

= 180-120

= 60 degree.

2. 180-(70+80)

= 180-150

= 30 degree.

Hope this helps you....

Answer 2

Answer:

According to Angle Sum Property, the sum of all the interior angles of a triangle is equal to 180°.

Let us assume the third angle in the following cases is ∠C.

1) ∠A = 60°, ∠B = 60°

∠A + ∠B + ∠C = 180°

60° + 60° + ∠C = 180°

120° + ∠C = 180°

∠C = 180° - 120°

∠C = 60°

2) ∠A = 70°, ∠B = 80°

∠A + ∠B + ∠C = 180°

70° + 80° + ∠C = 180°

150° + ∠C = 180°

∠C = 180° - 150°

∠C = 30°