### Activity

# Tic-Tac-Toe Circle Terms

High school geometry can be a challenge! This Tic-Tac-Toe game provides a fun way to practise vocabulary. You'll need to use your understanding of circles in order to conquer squares and earn points in this activity. It's an excellent way to study for a test! Review the "Terms to Know" before and/or during the game for extra help.

*Radius*: the distance from the centre of a circle to its edge

*Chord*: the distance from one edge of a circle to another

*Diameter*: the longest chord of a circle, as it passes through a circle's centre

*Centre*: the middle point of a circle

*Tangent*: a line or line segment that touches a circle at exactly one point

*Secant*: a line that intersects a circle twice

*Circumference*: the distance around the outside of a circle

*Minor arc*: the smaller of two arcs formed when a circle is divided into two unequal parts

*Major arc*: the larger of two arcs formed when a circle is divided into two unequal parts

*Semicircle*: exactly half of a circle

Learning circle terminology has never been easier with this fun game. The rules are very similar to Tic Tac Toe, a game that your child is probably knows very well. Best of all, once you're done playing, he'll have his circle words down pat.