# Equation of a Circle

HIGHER ONLY

Prerequisite Knowledge

To be able to use Pythagoras Theorem to determine the distance between two points on a Cartesian grid.

To be be able to correctly identify the circumference, radius and diameter of a circle and use the formulae for the area and a circumference of a circle.

Learning Objective

To understand and use the equation of a circle that is centered about the origin.

Key Vocabulary

Origin

Circumference

Diameter

Surd

Exact Value

Resources

PPT

Print out copies of slide 1 and put in plastic wallets to use as mini whiteboards.