Put Your Maths Skills to the Test!

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If each grey square is 1cm in width and length, then what is the area of the shape?

13 cm2
22 cm2
12 cm2
15 cm2

Fact Lab

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Interesting fact:

Pythagoras, the famous Greek mathematician, used to have small rocks to signify numbers while working on mathematical equations. This led to the origin of “calculus,” which means pebbles in Greek.