### Instruction: A convex pentagon has three right angles. The other two angles are congruent to each other. What is the measure, in degrees, of one of these other angles?### Response: To solve this problem, I need to use the fact that the sum of the interior angles of a convex pentagon is 540 degrees.
Let x be the measure of one of the non-right angles.
Then the other non-right angle is also x degrees, and the three right angles are each 90 degrees.
So I can write an equation for the sum of the angles: 90 + 90 + 90 + x + x = 540.
Simplifying this equation, I get 270 + 2x = 540.
Subtracting 270 from both sides, I get 2x = 270.
Dividing both sides by 2, I get x = 135.
So the measure of one of the non-right angles is 135 degrees.