Area of a Circle and a Sector — Unit test Answers
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What is the radius of a circle whose equation is x2+y2+8x−6y+21=0?
A
2 unitsB
3 unitsC
4 unitsD
5 units23
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What is the center of a circle represented by the equation (x−5)2+(y+6)2=42?
A
(−6,5)B
(−5,6)C
(5,−6)D
(6,−5)24
Line EF is tangent to circle G at point A.
A
90°B
95°C
190°D
195°25
Which equation represents the general form a circle with a center at (–2, –3) and a diameter of 8 units?
A
x2 + y2 + 4x + 6y – 51 = 0B
x² + y² – 4x – 6y – 51 = 0C
x2 + y2 + 4x + 6y – 3 = 0D
x2 + y2 – 4x – 6y – 3 = 0Did you find these answers helpful?
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