Geometry and Trigonometry practice question

Answer: 4.5 or 9/2

The radius is half the diameter.

Common wrong answers

If you answered 9

9 is the diameter.

If you answered 18

18 doubles the diameter.

If you answered 81

81 squares the diameter.

More Geometry and Trigonometry questions

• Easy
  Two angles of a triangle measure 40° and 75°. What is the measure of the third angle?
• Easy
  A triangle has a base of 10 and a height of 6. What is its area?
• Easy
  In a 30°-60°-90° right triangle, the shorter leg (opposite the 30° angle) has length 6. What is the length of …
• Easy
  A rectangle has a length of 8 and a width of 3. What is its perimeter?
• Easy
  A closed rectangular box has a length of 5 inches, a width of 4 inches, and a height of 3 inches. What is the …
• Easy
  In the xy-plane, a circle has center (2, −5) and radius 3. Which equation represents this circle?