Question

In a triangle two angles are 43° and 57° then what's the third angle​

Answer 1

We know that, the sum of all the interior angles of a triangle is 180°.

Measure of two angles = 43° and 57°

Third angle = 180° - (43° + 57°)

= 180° - 100°

= 80°

The measure of the third angle of the triangle is 80°.

Answer 2

Answer:

The third angle is 80°

Step-by-step explanation:

let third angle be x

43° + 57°+x =180 ( angle sum property )

100°+ x=180

x=180°-100°

X=80°

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