Question

How do I find the answer

Answer 1

You could use the Pythagorean Theorem (
`a^(2) +b^(2) =c^(2)`).

Since the side with length of 8 is opposite to the right angle, it is safe to assume that is the hypotenuse, or "c". You also know that the side with length 7 is either an "a" or "b" (It doesn't really matter what you use to replace though).

So the equation is now
`7^(2) +b^(2) =8^(2)`.

Now you solve for b:

`7^(2) +b^(2) =8^(2)` → 49+
`c^(2)`=64 →
`c^(2)`=64-49 →
`c^(2)`=15 → c=
`√(15)`≈3.87 units.

Hopefully this helps. Have a great day!

Answer 2

We can use the pythagorean theorem to find this answer.
`a^2 + b^2 = c^2` where a and b are the triangle legs and c is the hypotenuse. In this case, we're missing one of the legs.

`7^2 + b^2 = 8^2`

`49 + b^2 = 64`

`b^2 = 15`

`b = √(15)`

Therefore, the missing side is approximately is 3.88.