Question

What is the area of this trapezoid?

Answer 1

\[
Area = \frac h 2( B + b)
\]

Answer 2

\[
h^2 = 15^2 - 5^2 = 200\\
h = 10 \sqrt 2
\]

Answer 3

\[
Area = 5 \sqrt 2 (22 + 12)= 170 \sqrt 2
\]

Answer 4

the 5 is
\[\frac { 22 -12}2=5
\]