Angles in polygons

There are 72 NRICH Mathematical resources connected to Angles in polygons
Polygon Pictures
problem

Polygon Pictures

Age
11 to 14
Challenge level
filled star empty star empty star
Can you work out how these polygon pictures were drawn, and use that to figure out their angles?
Star Polygons
problem

Star Polygons

Age
11 to 14
Challenge level
filled star filled star empty star
Draw some stars and measure the angles at their points. Can you find and prove a result about their sum?