Circle Properties Practice Test

Using circle properties in calculations: A pizza has radius $r=7$ in, so its diameter is $d=14$ in. A chord is a straight segment between two points on the crust, and the diameter is a chord through the center. To find the distance around the pizza, you use the circumference formula. How can the radius be used to calculate the circumference of a circle?

Understanding radii and chords: Jenna measures a circle on a map symbol. She draws a radius from the center to the edge and then draws a chord between two edge points. She learns that the diameter is a chord that goes through the center. A chord can be shorter than the diameter. What is the relationship between the radius and a chord of a circle?