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Be careful to measure accurately when you are drawing a 2D shape. Draw a 2D shape that has 4 equal sides that are each 3 cm long and has 4 right angles. What is this shape called? It is a square.

So you could say 10cm 4mm is approximately 10cm. We can draw shapes accurately by measuring them too. For example, we can draw a triangle and measure the sides, so that it is accurate.