So we are trying to find this red line's length.
We can either find it directly, or use the blue line firs, and then use it as a leg for the green triangle.
So the blue leg is a hypotenuse for two of the edges. So:

from the Pythagorean Theorem
OR

Which works out to:

So now that we have that, using the Pythagorean Theorem again gives:


So the length of the red line is found that way.
But wait! There's more!
As it turns out, the red line can be found with an easier way that works with cubes and boxes (cuboids). It's really easy:

Where a, b, and c are all 10m, and d is the red line. This greatly reduces the math:

which gives the same answer as above, which you can see.
Answer: The answer is 6.
Step-by-step explanation:
Answer: SECOND OPTION
Step-by-step explanation:
To solve the problem you must:
-Multiply the numerators and the denominators of both expressions:

- Simplify the expression, as you can see below, then you obtain:

Therefore, as you can see, the answer is the second option
Answer:
25m
Step-by-step explanation:
Area = Side²
Side = √Area
= √625
= √25 x 25
= 25 m
Answer:
x=-1
Step-by-step explanation:
By adding the bottom lines you can get
2x+11 = x+10
Simplifying this gets you
x=-1