3 years ago

A 2.1 cm 2.9 cm Find the value of a.

1 answer:

3 0

Step-by-step explanation:

$a = \sqrt{ {2.9}^{2} - {2.1}^{2} } = \\ = \sqrt{8.41 -4.41 } = \\ \sqrt{4 } = 2$

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