Question 25
The diagram shows parallelogram $ABCD$ with $\angle BAD=60^\circ$, $AB=7$ cm, $AD=14$ cm, and a height of 6 cm. Arcs $BH,ED$ have centre $A$; arcs $BF,GD$ have centre $C$. The triples $A,B,E$; $F,D,C$; $A,H,D$; $B,G,C$ are collinear. Find the total shaded area in cm$^2$, taking $\pi=22/7$. Source note: the exact angle, side and height data are inconsistent; this item requires review.
