A prism with a pentagon-shaped cross-section is a pentagonal prism ... First work out the area of the triangular faces. The area of a triangle is ½ × base × height. There are two congruent ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. 00:00:00:00 ED LEMBKE-HOGAN: Did you know that there are 138 known pyramids in Egypt, all of them ...