Angles, triangles and polygons

By the end you’ll be able to

• Apply angle relationships for parallel lines cut by a transversal, and the interior and exterior angle sums of polygons
• Use triangle properties: the triangle inequality, isosceles and equilateral triangles, congruence, and similarity ratios of sides, perimeters and areas
• Apply the Pythagorean theorem, common Pythagorean triples and special right triangles (30-60-90 and 45-45-90)