Bluebook SAT Test Circles 1

Question 1

What is the radius of the circle with equation x² + y² = 49?

Accepted Answer

7

Answer

49

Answer

√49/2

Answer

24.5

Question 2

The center of the circle (x − 3)² + (y + 5)² = 16 is:

Accepted Answer

(3, −5)

Answer

(−3, 5)

Answer

(3, 5)

Answer

(−3, −5)

Question 3

A circle has center (0, 0) and radius 5. What is the circumference?

Accepted Answer

10π

Answer

25π

Answer

5π

Answer

2π

Question 4

A circle has radius 6. What is its area?

Accepted Answer

36π

Answer

12π

Answer

6π

Answer

72π

Question 5

An arc of a circle with radius 10 subtends a central angle of 90°. What is the arc length?

Accepted Answer

5π

Answer

10π

Answer

25π

Answer

2.5π

Question 6

A central angle of a circle measures 120° and the radius is 9. What is the area of the corresponding sector?

Accepted Answer

27π

Answer

54π

Answer

18π

Answer

81π

Question 7

An inscribed angle in a circle measures 35°. What is the central angle that subtends the same arc?

Accepted Answer

70°

Answer

35°

Answer

17.5°

Answer

140°