Bluebook SAT Test Circles 4

Question 1

What is the center of the circle x² + y² − 10x + 4y + 20 = 0?

Accepted Answer

(5, −2)

Answer

(−5, 2)

Answer

(10, −4)

Answer

(5, 2)

Question 2

A central angle of π/6 radians corresponds to how many degrees?

Accepted Answer

30°

Answer

60°

Answer

45°

Answer

15°

Question 3

A circle has diameter 14. What is its area?

Accepted Answer

49π

Answer

196π

Answer

14π

Answer

28π

Question 4

An arc subtends a central angle of 5π/6 radians in a circle of radius 6. What is the arc length?

Accepted Answer

5π

Answer

10π

Answer

6π

Answer

3π

Question 5

Two inscribed angles in the same circle intercept the same arc. What is the relationship between the two angles?

Accepted Answer

They are equal

Answer

One is double the other

Answer

They are supplementary

Answer

They are complementary

Question 6

A circle has area 64π. How long is an arc that subtends a central angle of 45°?

Accepted Answer

2π

Answer

4π

Answer

8π

Answer

π

Question 7

The circle (x + 4)² + (y − 1)² = 36 has been graphed. Which point lies on the circle?

Accepted Answer

(−4, 7)

Answer

(2, 1)

Answer

(0, 1)

Answer

(4, 1)