Look at point E on ray OE. The outer scale of the protractor shows 0 degrees on ray OE. Now go up on the protractor. You see the numbers going up on the outer scale, 10, 20, 30, etc. until ray OF is at 90 degrees. The measure of angle EOF is 90 degrees. A 90-degree angle is called a right angle.
Answer: D. Right; 90°
