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antoniya [11.8K]
4 years ago
6

What is the Square root of 81

Mathematics
2 answers:
Ksivusya [100]4 years ago
7 0
9x9=81 so the square root is 9
Alexeev081 [22]4 years ago
6 0
The answer is 9, hope this helps
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Answer:

first triangle (to left) b=8, second one c=17

Step-by-step explanation:

for the first triangle (one to the left) the hypotenuse is 9, so let's use the pythagorean formula.

A^2   +  B^2  = C^2

^              ^          ^

^              ^         Hypotenuse

^        second side

first side

Substitute:

5^2 + b^2 = 9^2

SImplify:

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Reduce:

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In the second triangle, we are given 2 sides.

Let's do the same thing we did in the first one.

Givens:

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B = 15

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C

Substitute:

8^2 + 15^2 = c^2

Simplify

64 + 225 = c^2

Reduce:

289 = c^2

Let's now square root both sides

square root of 289 is 17

so we are left with this:

c=17

Phew, you did it!

Hope this helped :))

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