Arc length is a fraction of circumference. Area of a sector is a fractions of the area of a circle. Both can be calculated using the angle at the centre and the diameter or radius. Practice circle ...

This slideshow is 26 slides long and is on the Coordinate geometry, circles, it can be used to teach your students, from scratch, and covers a series of lessons containing examples, exercise questions ...

Master relative positions of two circles with practice problems and answer key! Help your secondary geometry students master the relative position of two circles with this comprehensive practice ...

Evan O’Dorney leaps from his seat and snatches the chalk from his teacher’s hand. “I think it goes like this,” the eighth-grader exclaims. He has come up with a formula for the number of ways to ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...