Unit Test — Unit test Answers

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Line segment KL is tangent to circle J at point K.

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A
8 units
B
10 units
C
12 units
D
16 units
2
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In circle T, ∠PTQ ≅ ∠RTS.

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A
24°
B
33°
C
48°
D
66°
3

Which equation represents the circle described?The radius is 2 units. The center is the same as the center of a circle whose equation is x2 + y2 – 8x – 6y + 24 = 0.

A
(x + 4)2 + (y + 3)2 = 2
B
(x – 4)2 + (y – 3)2 = 2
C
(x – 4)2 + (y – 3)2 = 2²
D
(x + 4)2 + (y + 3)2 = 2²
4

Circle C is shown. Secants U W and Y W intersect at point W outside of the circle. Secant U W intersect the circle at point V and secant Y W intersects the circle at point X.

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A
39°
B
41°
C
78°
D
82°
5

In circle P, diameter QS measures 20 centimeters.

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A
9.9 centimeters
B
19.9 centimeters
C
21.5 centimeters
D
43.0 centimeters
6

Circle A is shown. Tangents L M and N M intersect at point M outside of the circle. Arc L N is 270 degrees.

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A
75°
B
90°
C
120°
D
135°
7

Consider circle Y with radius 3 m and central angle XYZ measuring 70°.

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A
1.8 meters
B
3.7 meters
C
15.2 meters
D
18.8 meters
8

In circle O, and are diameters. The measure of arc AB is 55° and the measure of arc CD is 25°.

Question illustration
A
100°
B
125°
C
235°
D
280°
9

A point is on a circle if the distance from the center of the circle to the point is equal to the

A
area.
B
circumference.
C
radius.
D
diameter.
10

Circle D is inscribed with triangle A B C. The measure of arc A B is 76 degrees. Point E is on the circle between points B and C.

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A
134°
B
150°
C
209°
D
210°
11

Circle B is shown. Line segments A B and C B are radii. The length of A B is 6. Sector A B C is shaded.

Question illustration
A
6
Option A
B
9
Option B
C
18
Option C
D
36
Option D
12

Which is true regarding secants and chords?

A
Chords intersect the perimeter of a circle at two points. Secants intersect the perimeter of a circle once.
B
Chords intersect the perimeter of a circle at one point. Secants intersect the perimeter of a circle twice.
C
Chords and secants intersect the perimeter of a circle twice. Chords are segments entirely within a circle, while secants are lines or rays that extend through a circle.
D
Chords and secants intersect the perimeter of a circle twice. Chords are lines or rays that extend through a circle, while secants are segments entirely within a circle.
13

Circle C is shown. Radius A has a length of r.

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A
32
Option A
B
64
Option B
C
256
Option C
D
1024
Option D
14

Circle D is shown. Angle A C B intercepts arc A B. Arc A B has a measure of 76 degrees.

Question illustration
A
38°
B
76°
C
90°
D
152°
15

Circle O is shown. Chords K M and J L intersect at point A. The measure of arc K J is 170 degrees. The measure of arc L M is 80 degrees.

Question illustration
A
50°
B
55°
C
125°
D
250°
16

What is the radius of a circle whose equation is (x + 5)2 + (y – 3)2 = 42?

A
2 units
B
4 units
C
8 units
D
16 units
17

Line segment SU is a diameter of circle V.

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A
56°
B
68°
C
112°
D
163°
18

Circle T is shown. Angle Q S R intercepts arc Q R. Angle Q S R is 52 degrees.

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A
26°
B
52°
C
104°
D
128°

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