Question

Two equal angles of a triangle are of measure 80° each . The measure of third angle is -------------- .
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Answer 1

Answer:

let the third side be x

(sum of all angles of triangle is 180⁰

so,80⁰+80⁰+x=180⁰

160⁰+x=180⁰

x=180⁰-160⁰

x=20⁰

Answer 2

Answer:

There are 180° in a triangle. If two angles are equal, we know that one angle is 80°. We can write an equation 80+2x=180°. We subtract 80 from both sides to get 2x=100. We then divide by 2 on both sides to get x=50°.

Step-by-step explanation:

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