Area of a Circle and a Sector — Unit test Answers
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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.
A
134°B
150°C
209°D
210°42
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What is the radius of a circle whose equation is (x + 5)2 + (y – 3)2 = 42?
A
2 unitsB
4 unitsC
8 unitsD
16 units43
Consider a circle whose equation is x2 + y2 – 2x – 8 = 0. Which statements are true? Select three options.
A
The radius of the circle is 3 units.B
The center of the circle lies on the x-axis.C
The center of the circle lies on the y-axis.D
The standard form of the equation is (x – 1)² + y² = 3.E
The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.44
Circle D is shown. Angle A C B intercepts arc A B. Arc A B has a measure of 76 degrees.
A
38°B
76°C
90°D
152°45
Arc AB is of the circumference of a circle. What is the radian measure of the central angle?
A
StartFraction pi over 6 EndFraction
B
StartFraction pi Over 3 EndFraction
C
StartFraction 2 pi Over 3 EndFraction
D
StartFraction 5 pi Over 6 EndFraction
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