Which has a measure that is equal to the sum of the measures of the interior angles of a triangle?

a straight line
a circle
a right angle
an obtuse angle

Option A. a straight line.

Step-by-step explanation:

As we know sum of the interior angles of a triangle is equal = 180°

Therefore for option A.

All angles on a straight line is equal to 180°.

Fro option B.

Sum of all angles at point is equal = 360° or a circle, which is not equal to 180°. Therefore not the answer.

For option C.

a right angle is equal to 90°. Therefore not the answer.

For option D.

An obtuse angle is greater than 90° but always less than 180°. Therefore not the answer.

just sum

10 + 10 = 20