Question

One leg of a right triangle is 4 cm the hypotenuse is 10 cm how long it the other leg

Answer 1

Answer: 9.17cm

Since it is a right angle triangle, we can use Pythagoras Theorem to find the missing leg.

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Formula 
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a² + b² = c², c being the hypotenuse.

The hypotenuse, denoted by c, is 10cm. One leg, denoted by a, is 4cm.  Apply the formula and solve for the other leg, denoted by b.

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Solve the missing side
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a² + b² = c²
4² + b² = 10²
16 + b² = 100             ←subtract 16 from both sides
-16           -16
b² = 84                       ←square root both sides
b = √84
b = 9.17 (nearest hundredth)

So the other leg, denoted by b, is 9.17cm

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Answer: 9.17 cm
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Answer 2

I hope this will work.