4.1
Angles, lines & triangles
Angle facts; parallel lines; triangle sums/types.
Syllabus Statements
- Distinguish between acute, obtuse, reflex and right angles
- Use angle properties of intersecting lines, parallel lines and angles on a straight line
- Understand the exterior angle of a triangle property and the angle sum of a triangle property
- Understand the terms 'isosceles', 'equilateral' and 'right-angled triangles' and the angle properties of these triangles
4.1.1 Drawing, Measuring and Estimating Angles
4.1.3 Basic Angle Facts
Corbett Maths · Video
Angles Video
Corbett Maths · Video
Angles in Parallel Lines Video
Corbett Maths · Video
Finding the Area of Any Triangle Video
4.1.4 Angles in Parallel Lines
Corbett Maths · Video
Angles in Parallel Lines
4.1.5 Angles in Polygons
Corbett Maths · Video
Angles in Polygons