Parabolas (Sec 9-4) — Unit test Answers

A parabola can be represented by the equation x2 = 2y.

Line segment SU is a diameter of circle V.

Line segment ON is perpendicular to line segment ML.

A Ferris wheel has a diameter of 42 feet. It rotates 3 times per minute. Approximately how far will a passenger travel during a 5-minute ride?

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

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.

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

AD and MN are chords that intersect at point B.

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

Circle D is shown with the measures of the minor arcs.

Line segments XY and ZY are tangent to circle O.

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

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

Which is true regarding secants and chords?

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.

A point is on a circle if the distance from the center of the circle to the point is equal to the

A general formula for a parabola is x2=4py.What is the value of p in the equation x2=12y?

Line segment KL is tangent to circle J at point K.

Segments RT and SU are diameters of circle O.

Circle C is shown. Secants U W and Y W intersect at point W outside of the circle. Secant U W intersect the circle at point V and secant Y W intersects the circle at point X.