Question

Nora measured the angles of a triangle. Two of the angles measured 20° What was the measure of the third angle of Nora’s triangle?

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Answer 1

140°

Explanation:

The sum of angle of a triangle is equal to 180°.

Two of the angles measured 20°.

We need to find the measure of the third angle of Nora’s triangle. let the third angle is x. So,

20+20+x = 180

40+x = 180

x = 180-40

x = 140°

So, the third angle of the triangle is 140°.