BBC1 年
KS2 Maths teaching resources: Regular and irregular polygons
ZACH: What does a regular decagon look like?Oh! So different ... ADA: Can you tell which are regular polygons and which are irregular polygons?We already know that this one is regular, and ...
BBC7 年
Polygons - sum of interior angles
Polygons can be regular or irregular in shape ... Find the size of one interior angle of a regular pentagon. In order to do this, the sum of the interior angles must first be known.