2 math questions from BB 2nd edition

Mikeypz
Tue, 26 Jul 2011 15:31:23 +0000

Both from test 1

section 3, number 19:
The pyramid shown above has altitude h and a square base of side m. The four edges that meet at V, the vertex, each have length e. If e = m, what is the value of h in terms of m?

The answer is a) m/(sqrt(2))

but I got b) m sqrt(3) / 2

Don’t you just do pythagorean theorem?
(.5m)^2 + h^2 = e^2?
I’m confused :o

Then…
Section 7, number 17!

Any help is appreciated
Thanks guys!