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If Area = 70mm2

and Height = 20mm

Then Base = 7mm

Using the formula Area = 0.5 x base x height, we can see that

70mm2= 0.5 x base x 20mm.

Then, with simple algebra we can see that

70mm2/(0.5 x 20mm) = base

Therefore, base = 7mm

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Q: What is the length of the base of a triangle with height 20mm and area 70mm squared?
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