**62. “HK” (HAWK) MATH ATTACK**

*(*Discussion)

**Description:**HK Math Attack is a mnemonic device used to locate the center of a circle.

**Application:**Use this acronym to teach students how to find the center of a circle.

**Process:**Teach students the following formula: (x-H)^2 + (y-K)^2 = R^2. Tell students that the center of the circle is (h,k) and using the formula, students will be able to find the center of any circle and by extension, the radius.

Ex. (x-3)^2 + (y-5)^2 = 100. Tell students to find “h” first (3). Next, direct students to find “k” (5) and using the “h comes first, k comes second” method, students will be able to determine the center of the circle. Remind students to find the radius as well.

*Reference, graphics, and/or for more information:*

**62. “HK” (HAWK) Math Attack**

Sumpter, S. (2009). “HK” Math Attack. Cross Creek Early College.