The vector illustration showcases the different types of angles commonly studied in geometry. It includes the acute angle (less than 90°), right angle (exactly 90°), obtuse angle (greater than 90° but ...

The sum of the angles inside any polygon can be found by spitting the polygon into triangles. Sum of interior angles = 180(n – 2) where n is the number of sides In a regular polygon all the angles are ...

Before reading this guide, it may be helpful to read the guides from Module 1 on the properties of angles and the properties of 2D shapes. The sum of the angles inside any polygon can be found by ...

1 Faculty of Education, Curriculum and Instruction, University of Victoria, Victoria, BC, Canada 2 Faculty of Education, University of Alberta, Edmonton, AB, Canada Projective geometry is a prominent ...