Question

If measure of two interior angles of a triangle are 80° and 40°. Find the measure of third angle​

Answer 1

Answer:

let the 3rd angle be 'x'.

we know that,

sum of interior angles in a triangle = 180 degrees.

so,

80 + 40 + x = 180

120 + x = 180

x = 180 - 120

x = 60 degrees.

therefore, the measure of 3rd angle = 60 degrees.