Answer:
D
Step-by-step explanation:
Neither Alex nor Jo are correct, because surface area is a 2-dimensional quantity, so it would be given in just square units, not linear nor cubic.
Answer:
Step-by-step explanation:
The relationship that exists between the length of the hypotenuse and the length of the legs is that the sum of both of the legs lengths squared is equal to the hypotenuse length's squared or in other words, the Pythagorean theorem.

Hope that helps!
Answer:
B
Step-by-step explanation:
In an isosceles triangle, the altitude is the median so the altitude splits the base into two segments with lengths of 5. We notice that x is part of a right triangle with legs of 5 and 12, therefore, using the 5 - 12 - 13 Pythagorean Triple, x = 13.
Answer:
Step-by-step explanation:
diagonal=
diagonal=
diagonal=14.1421356
You need to first do area. You do coordinate grids. First, you have do find the unkwon numbers and simplify it by two. You first put 3 numbers on y grid and 3 on x grid. You then add them 3 and seperate and other one too. Then make it up a fraction. If there is variable, then don't you leave it.