Question

Can someone help me with this one
Find the area of the following ellipse. (Round answer to the nearest tenth).
2a = 10 cm; 2b = 20 cm.
A = _____cm²

Answer 1

The area of an ellipse is given by A = pi * a * b.

So we would have:

A = pi( 5 )( 10 ) = 157.0796327

To the nearest tenth, you have:
\[A = 157.1cm^{2}\]
I'm assuming that 2a is twice the length of half of the semi-major axis and 2b twice the length of half the semi-minor axis.

Follow this link to get more information:
http://www.math.hmc.edu/funfacts/ffiles/10006.3.shtml