Question

Orlando is measuring the angles of a triangle. He measures the first two angles and gets 30° and 70°. What should be the measure of the third angle?

A) 50°
B) 80°
C) 100°
D) 260°

Answer 1

The answer will be B because all three angles of the triangles add up to180 degrees, and we already know the total of two other angles are 100 degrees, which made the unknown angles have 80 degrees. Hope it help!

Answer 2

B) Third angle 80°.

Explanation:

Given : Orlando is measuring the angles of a triangle. He measures the first two angles and gets 30° and 70°.

To find : What should be the measure of the third angle.

Solution : We have given a triangle

One angle of triangle = 30° .

Second angle of triangle = 70°.

Let the third angle = x .

By the angle sum property : Sum of all the angle of a triangle is 180°.

Then, 30° + 70° + x = 180.

100 ° + x = 180°.

On subtracting both sides by 100

x = 180 - 100.

x = 80 degree.

Therefore, B) Third angle 80°.