MathNet 1999 — Part 01 Question 83

Question 83

In an isosceles trapezoid, a diagonal is $22~\mathrm{cm}$ long; it is also known that this diagonal forms an angle of $45^\circ$ with the larger base. What is the area of the trapezoid?

$121~\mathrm{cm}^2$
$242~\mathrm{cm}^2$
none of the above.
$484~\mathrm{cm}^2$
the data is insufficient