Question

1. Two angles of a triangle are 30° and 80°. Find the third angle.

2. One of the angle of a triangle is 80° and the other two angles are equal. Find the measure of each of the equal angles.​

Answer 1

Answer:

1 . Third angle is 70 °

2. the two angles are 50° and 50 °

Answer 2

Answer:

1. Given, two angles of the triangle are 30° and 80°.

Let the 3rd angle be x.

Sum of all angles of a triangle equals to 180°.

So,

x + 30° + 80° = 180°

x = 180° - 110°

x = 70°

So, the third angle measures 70°.

2. Given, one angle measures 80°.

Let the two angles measure x° each.

Sum of all angles of a. triangle equals to 180°.

So,

x + x + 80° = 180°

2x = 180° - 80°

2x = 100°

x = 50°

So, each of the two equal angles measure 50°.

I hope this helps.