Answer:
140 should be the sum of the interior angles
Step-by-step explanation:
I hope I did this right
180 interior angles in a triangle, you need one of the sides. If an angle's exterior is 40 degrees, we know that the interior angle is 140 degrees. This means that the sum of the other interior angles have to be 40 as 180-140 is 40.The sum of the three angles of any triangle is equal to 180 degrees.
