**Word Wall**

**Area of a Circle (A)** – The number of square units inside of the circle. A = πr^{2}

**Chord** – A line crossing from edge to edge in a circle, not necessarily through the center.

**Circumference (C)** – The distance around a curved geometric shape, in this instance a circle. C = 2πr

**Diameter (d)** – A line crossing from edge to edge through the center of a circle. d = 2r

**Hypotenuse** – The side of a triangle that is opposite the right angle.

**Irrational Number** – A real number that has infinite integers following the decimal point without repeating.

**Normalize** – The process of bringing a function back to its most basic (or normal) form.

**Radius (r)** – A line from the center of the circle to the edge. Exactly half of the diameter. r = d ÷ 2

**Tangent** – A line that touches a curve or circle at only one point.