Circles Features

How many chords?

• 1

• 2

• 3

• none

A ​ (a)   is the set of all points (x,y) in a plan that are equidistant from a fixed point (h,k). The fixed point (h,k) is called the ​ (b)   of the circle. The distance r between the center and any point (x,y) on the circle is the ​ (c)   .​

• circle

• center

• radius

• line

• parabola

• hyperbola

• ellipse

• slope

• polynomial

(x-1)^2+(y+13)^2=16

• (1,-13)

• area

• 8*pi

• center

• 8

• circumference

• 4

• radius

• 16*pi

• diameter

A set of all points in a plane that are a fixed distance from a fixed point is called a

The definition of a circle is

• set of all points in a plain that are the same distance from a point called the center

• the distance around a shape

• set of all points that have different distance from a center

• polygon that has a fixed shape

Point B is 17 cm from the center of the circle. AB is tangent to the circle at A. Given that AB = 15 cm, find the radius of the circle.

• 8 cm

• 9 cm

• 2 cm

• 16 cm

How long is the radius of this circle?

• 4cm

• 2cm

• 8cm

• 16cm

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

• 11.32 ft

• 12.25 ft

• 10.99 ft

• 8.75 ft

Does this picture show the diameter or radius of a circle?

• Diameter

• Radius

What is line PQ?

• diameter

• radius

• segment

• chord