Answer:
?=9
Step-by-step explanation:
We have a special right triangle, the 45-45-90 triangle.
In a 45-45-90 triangle, the side lengths are x, and the hypotenuse is x√2.
Since we know that the side length is 9, this means that:

The ? is 9.
Answer:
the distance between the points is 13
A cross section is the shape you see when you make one slice through a solid. A solid can have many different cross sections depending on where you make the slice. Consider the following hexagonal pyramid. Cross sections perpendicular to the base and through the vertex will be triangles.
Hope this helps!! - xeyaba
Answer:
A, C, D B, or A D B C
Step-by-step explanation: