Question

the measure of teo angles are 20 degrees amd 80 degrees find the measure of the third angle of a triangle​

Answer 1

Step-by-step explanation:

The sum of the interior angles of a triangle are equal to 180o. To find the third angle of a triangle when the other two angles are known subtract the number of degrees in the other two angles from 180o.

Answer 2

Answer:

80°

Step-by-step explanation:

Angle sum property of a ∆ states that the sum of all three angles of a ∆ is 180°

let given angles be

A = 20°

B = 80°

C = ?

we know

A+B+C=180°

20°+80°+C=180°

100°+C. = 180°

C. = 180°-100°

C. = 80°

so third angle of triangle (C) is 80°.