Unit Test — Unit test Answers

In quadrilateral QRST, measures (5x+15)°. Angle TQR measures (4x+3)°.

Two circles are concentric if they have the same center.

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

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

UV and RV are secant segments that intersect at point V.

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

Which circle shows that measures 60°?

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 .

Angle G is a circumscribed angle of circle E.

Line segment BD passes through the center of circle C, BH = a, and HD = 8.

Line EF is tangent to circle G at point A.

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

Circle H is shown. Line segments G H and J H are radii. The length of G H is 20. Angle G H J is 162 degrees.

Line segment ON is perpendicular to line segment ML, and PN = 10.

A regular polygon is drawn in a circle so that each vertex is on the circle and is connected to the center by a radius. Each of the central angles has a measure of 40°. How many sides does the polygon have?

Circle F is congruent to circle J, and ∠EFD ≅ ∠GJH.m∠DFE = 80°. What is the measure of arc ?°