Area of a Circle and a Sector — Unit test Answers

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

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

Angle BCD is a circumscribed angle of circle A. Angle BAC measures 53°.

Angle D is a circumscribed angle of circle O.

Circle L is shown. Line segments K L and M L are radii. The length of K L is 12. Angle M L K is 60 degrees. Sector M L K with a 60 degree angle is shaded.

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

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.

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.

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

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

Circle O has a circumference of 36π cm.

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

Consider a circle whose equation is x2 + y2 – 2x – 8 = 0. Which statements are true? Select three options. The radius of the circle is 3 units.The center of the circle lies on the x-axis.The center of the circle lies on the y-axis.The standard form of the equation is (x – 1)² + y² = 3.The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.