Question

If the sum of 2 angles makes a straight angle and one of them is an obtuse angle, what is the measure of the other angle?

1) 90 degrees
2) 180 degrees
3) 45 degrees
4) Cannot be determined

Answer 1

The measure of the other angle is 90 degrees.

Step-by-step explanation:

In a straight angle, the sum of two angles is always 180 degrees. If one of the angles is obtuse, which means it is greater than 90 degrees, the other angle must be the remaining measure needed to make the sum 180 degrees. Therefore, the measure of the other angle is 90 degrees (Option 1).