Posted by Peter on 21st April 2008

Free Y4 maths worksheet: Concave and convex shapes

shapeWe usually think of the terms convex and concave in relation to mirrors and lens. The word convex means curving out or bulging out but it can also be applied to polygons. A convex polygon is one where all the internal angles are less than 180 degrees – the type that we are most familiar with. A concave polygon will have an interior angle greater than 180 degrees – it looks as if it has been pushed in on one side.

Free Y4 maths worksheet: Concave and convex shapes

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