50 diametera segment that passes through the center of the circle and whose endpoints are on a circle.
51 radiusa segment whose endpoints are the center of the circle and a point on the circle.
52 circumferenceDistance around a circle.Measured in single units
53 pi (𝜋)…………………..The ratio of a circle’s circumference to its diameter is the same for all circles.This ratio is represented by the Greek letter (pi).The value of is irrational. Pi is often approximated as 3.14 or
54 Circumference and Area of a Circle The circumference C of a circle is given by the formula 𝑪=𝝅𝒅 or 𝑪=𝟐𝝅𝒓The area A of a circle is given by the formula 𝑨=𝝅𝒓𝟐
55 coordinate planea plane that is divided into four regions by a horizontal line (x-axis) and a vertical line (y-axis) .The location, or coordinates, of a point are given by an ordered pair (x, y).
56 legIn a right triangle, the two sides that form the right angle
57 hypotenuseThe side across from the right angle that stretches from one leg to the otherIn other words, the longest side of a triangle.
58 transformationa change in the position, size, or shape of a figure