Most of us can identify convex and concave shapes and get them all right. A few of us need to look again at the meanings of the two words. Look carefully at the board above. Can you see why the light blue shape is concave? You can draw a straight line that starts inside the shape, goes outside, and goes back in again. You cannot do that with a convex shape.
Wednesday, January 25, 2012
Maths: convex and concave shapes
Most of us can identify convex and concave shapes and get them all right. A few of us need to look again at the meanings of the two words. Look carefully at the board above. Can you see why the light blue shape is concave? You can draw a straight line that starts inside the shape, goes outside, and goes back in again. You cannot do that with a convex shape.
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