Question

Geometry help please

Answer 1

I assume you're looking for the volume? Then it's

Volume = (area of base) * length, treating the triangle as the base.

To find the area of the triangle, use area = 0.5*base*height. The length of the base of the triangle is given, and the height can be found by using Pythagoras's Theorem. (h^2+6.5^2 = 13^2)