Whats this method called? How do you use this strategy for other questions?

Answer with Step-by-step explanation:

The method uses the formula of the right angles triangle, more precisely the pythogorean formula,

In step 2, it is the power law of indices,

Other than this, other tricks used here is the using of square root on step no 6.

You can take the square root ,cube root, square, etc in equations but you have to do it on both sides, you can even add r subtract numbers and do all sorts of things.

it is the process of solving equations by equality.

Eg:

x=5

x^2=5^2

√x=√x

x-7=5-7

8/2x=8/2*5, etc

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

step-by-step explanation: