Question 19
Four identical circles touch the large circle and pass through its centre, arranged as shown. The large circle has diameter 28 cm. Find the shaded area in square centimetres, using $\pi=22/7$.
Answer format: enter one whole number without units. The printed paper uses four answer-sheet digits with leading zeros when needed; ordinary numeric entry is used here.
Answer format: enter one whole number without units. The printed paper uses four answer-sheet digits with leading zeros when needed; ordinary numeric entry is used here.