Equation of a Circle — Unit test Answers

Line EF is tangent to circle G at point A.

Two circles are concentric if they have the same center.

Angle G is a circumscribed angle of circle E.

Which equation represents the general form a circle with a center at (–2, –3) and a diameter of 8 units?

Triangle JKL is equilateral. One side of the triangle, JL, is a diameter of circle M. Which is true about line segments JK and KL?

Circle O is shown. Line segments C O And A O are radii. Lines are drawn from points C and A to point B to form chords B C and B A. Angle C B A is 80 degrees.

What is the center of a circle represented by the equation (x−5)2+(y+6)2=42?

Triangle BCD is isosceles and BC ≅ BD.

is tangent to circle P at point Q.

Points D, E, and F are on circle C and EF ≅ DF.

A circular table top has a radius of 24 inches.What is the area of the table top, to the nearest square inch? Use 3.14 for .

In circle O, and are diameters. Arc ED measures 17°.

What is the radius of a circle whose equation is x2+y2+8x−6y+21=0?

What is the center of a circle represented by the equation (x+9)2+(y−6)2=102?

What is the radius of a circle whose equation is (x – 7)2 + (y – 10)2 = 4?