Find out about different regular and irregular polygons. What are the types of triangle? Find out about scalene, equilateral, isosceles and right-angled triangles. What are the parts of a circle?

Ontario’s new Grade 9 math course is part of the province’s four-year mathematics strategy to ensure students have the skills they need for the future. Grade 9 math was last updated in 2005. There has ...

Revise the different types of angles and rules for calculating angles. This guide includes interactive activities and a quiz. NEW: Angles in parallel lines Revise alternate, correspondent or ...