Key Concepts

• Convert a Fraction to a Decimal To convert a fraction to a decimal, divide the numerator of the fraction by the denominator of the fraction.
• Properties of Circles
  

$r$ is the length of the radius

$d$ is the length of the diameter

The circumference is $2\pi r$ , $C=2\pi r$

The area is $\pi {r}^{2}$ , $A=\pi {r}^{2}$

Glossary

circumference of a circle

The distance around a circle is called its circumference.

diameter of a circle

A diameter of a circle is a line segment that passes through a circle’s center connecting two points on the circle.

radius of a circle

A radius of a circle is a line segment from the center to any point on the circle.

repeating decimal

A repeating decimal is a decimal in which the last digit or group of digits repeats endlessly.