The figure shows a parallelogram ABCD.
If squares of area S1, S2, S3, and S4 are constructed on the
sides and diagonals, prove that 2S1 + 2S2
= S3 + S4
Median length, Apollonius' Theorem
Euclid's Elements Book II Proposition 13
Area of a Parallelogram |
comment | By Antonio Gutierrez