Parabolas (Sec 9-4) — Unit test Answers

Angle K measures 67º and angle L measures 119°.

Consider circle C with angle ACB measuring radians.

On a coordinate plane, a parabola opens to the left. It has a vertex at (0, 0), a focus at (negative 2, 0), and a directrix at x = 2.

All tangents to the circle are congruent and form a square. The perimeter of square ACEG is 24 cm.

Two chords intersect at a point inside a circle that is not the center of the circle. Which statement must be true?

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.

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

Which graph represents the equation x2 = 8y?

A parabola and its directrix are shown on the graph.

In circle O, MP is a diameter.

A parabola has a vertex at the origin. The focus of the parabola is located at (–2,0).

Circle R is shown. Tangents F G and H G intersect at point G outside of the circle to form an angle with a measure of 50 degrees. Point E is on the second arc. Arc F H has a measure of x degrees.

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

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.

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, AD and BE are diameters.

Circle Y is shown. Line segments X Y and Z Y are radii. The length of X Y is 16. Sector X Y Z of the minor angle is shaded.

The chords intersect at point U.

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

Circle O is shown. Tangents B C and B A intersect at point B outside of the circle. The measure of the first arc formed is 146 degrees.