Find the area of the given figure (not drawn to scale)

In the given figure, all triangles are equilateral and $PQ=12$ units. Other triangles have been formed by taking the midpoints of the sides. What is the perimeter of the figure?

Ishika has designed a small oval racetrack for her remote control car. Her design is shown in the figure. What is the total distance around the track? Round your answer to the nearest whole $\mathrm{cm}$.

Area of the shaded portion is

In the given figure,$\mathit{ }ABCE$ is a parallelogram. $P$ is the midpoint of $AD$ and $AD\perp EC$. If  $AD=20 \mathrm{cm}$ and  $EC=18 \mathrm{cm}$, then find the area of the given figure.