Question

Help I don't understand ​

Answer 1

A) An isosceles Triangle with base 12 yards and height 14 yards.

Explanation:

I feel as though this is quite possibly for a major documented test, thus I would feel it necessary to advise you against seeking outside help.

But to adequately answer your question, the answer is A.

This is because you can imagine the shape as a simple net. The height is without a doubt the 14yd because it extends from the base to the tip of the triangle. The BASE can be tricky, except when you imagine it as a NET. If you do so, you'll realize that the length of the perimeter is actually the bottom base of the triangle, in the hypothetical where we need to remove and inspenct a single isoscles triangle from this shape.

Answer 2

a. An isosceles triangle with base 12 yards ...

Explanation:

The midpoint of each 8-yard side is in the plane of the cross section of interest, as is the vertex of the pyramid. Those three points ...

• define the plane of the cross section
• define the shape of the cross section

Connect the dots and you have a triangle with a height of 14 yd and a base of 12 yd (the distance from one 8-yd side to the other). This matches the description of choice A.