Imagine you are a nine year old child. You are used to doing homework because that's what nine year old children do nowadays. Your teacher gives you an assignment.
"I want you to draw an A-Z of mathematical shapes, including both 2D and 3D examples."
So you ring up your mum.
"Mum, we've got to draw an A-Z of mathematical shapes, including both 2D and 3D examples."
So your mum says "don't worry, I'll help you".
So your mum boots up the computer and looks on Google for lists of mathematical shapes. She finds some sites such as A to Z Of Maths Is Fun, Wikipedia's List Of Mathematical Shapes, etc, prints off the shapes such as Acute Triangle, Bezier Curve, Circle, Decagon, etc, says "there you are, love," gives you the examples and you sit down and copy them, making sure the shapes have the right number of sides, the correct angles, etc.
Your mum checks you have copied the shapes properly and you are allowed to go to your bedroom to call your friends.
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