Question

How many dominos are needed to complete the triangle?

Answer 1

B. 6

Detailed explanation:

Alright, so using the Pythagorean theorem,
`c^(2) =a^(2) +b^(2)` in this case, we have the "c" and "b" of the triangle. Therefor, we are looking for "a"

so, to solve the problem, simply begin by substituting what you already have:

`10^(2) =a^(2) +8^(2)`

Now that this is substituted, The next step is to go ahead and find the values after solving the exponents:

`10^(2) =100\\ 8^(2)=64`

Now, we need to find the value of "a".

In this case, we are provided with 4 options and one of them has to be correct.

If "a"=12 then "a squared" would equal 144.

the statement 100=144+64 is incorrect.

If "a"=6 then "a squared" would be 36.

The statement 100=36+64 is correct.

If "a"=36 the "a squared" would be 1296.

The statement 100=1296+64 is incorrect.

If "a"=18, then "a squared" would be 324.

The statement 100=324+64 is incorrect.

Therefor, the answer is B.6

Hope this helps ^-^

Answer 2

Only 3 is needed

Explanation: