Posted by Emily on .
A parallelogram has sides 8 and 12. The shorter altitude is 6. Find the length of the other altitude.

It says the answer is 9, but I don't know how they got that. Any help is greatly appreciated!!
=D

math (geometry) 
Reiny,
The area is base*height(altitude)
So if the base is 12 and the height is 6 then the area is 72
but we can also calculate the area with the other base and the other height.
Let the other height be h
then (8)(h) = 72
h = 9 
math (geometry) 
Emily,
Oh, ok, that makes a lot more sense. Thank you very much!