Topic 9 · Measurement & Geometry
Geometry
Angles in polygons, tessellations, multi-step angle problems and coordinates on a line segment.
By the end of this topic you can…
- Find interior and exterior angles of a polygon
- Explain why a shape does or does not tessellate
- Solve angle problems using several rules together
- Find the midpoint and points that divide a line segment
Lessons
- Angles in Polygons The interior angle sum , the exterior angle sum of , and the angles of regular polygons.
- Tessellations Which shapes fit together with no gaps or overlaps — and the angle rule that decides it.
- Angle Geometry Problems Combining alternate, corresponding and co-interior angles with triangle and polygon facts — and giving a reason for every step.
- Coordinates on a Line Segment Finding the midpoint, and the point a given fraction of the way along a line segment, from the coordinates of its ends.
Geometry quiz
Ten questions drawn at random from a bank of fourteen, covering polygon angles, tessellations, parallel-line angles and coordinates on a line segment.
10 questions · pass mark 70%