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10 cards from this deck
Branch of maths measuring length, area & volume
Total distance around outer edge of a shape
Square units (mm², cm², m², km²)
A=12bhA = \frac{1}{2}bhA=21bh
A=12(a+b)hA = \frac{1}{2}(a + b)hA=21(a+b)h
A=s(s−a)(s−b)(s−c)A = \sqrt{s(s-a)(s-b)(s-c)}A=s(s−a)(s−b)(s−c)
s=a+b+c2s = \frac{a+b+c}{2}s=2a+b+c
Shape made of 2+ basic shapes joined together
C=2πrC = 2\pi rC=2πr or C=πdC = \pi dC=πd
A=πr2A = \pi r^2A=πr2
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