Karen Morrison and Nick Hamshaw Solutions for Exercise 2: Exercise 7.2

Calculate the area of the shaded region in the following figure. Take $\mathrm{\pi }=\frac{22}{7}$

Calculate the area of the shaded region in the following figure. Take $\mathrm{\pi }=\frac{22}{7}$

Calculate the area of the shaded region in the following figure. Take $\mathrm{\pi }=\frac{22}{7}$

Calculate the area of the shaded region in the following figure. Take $\mathrm{\pi }=\frac{22}{7}$

The diagram shows a plan for a rectangular garden with a circular pond. The part of the garden not covered by the pond is to be covered by grass. One bag of grass seed covers five square-meters of lawn. Calculate the number of bags of seed needed for the work to be done. Take $\mathrm{\pi }=\frac{22}{7}$

The diagram shows a road sign. If the triangle is to be painted white and the rest of the sign will be painted red, calculate the area covered by each colour to $1$ decimal place. Take $\mathrm{\pi }=\frac{22}{7}$

Sixteen identical circles are to be cut from a square sheet of fabric whose sides are $0.4 \mathrm{m}$ long. Find the area of the leftover fabric (to two decimal places) if the circles are made as large as possible. Take $\mathrm{\pi }=\frac{22}{7}$

Anna and her friend usually order a large pizza to share. The large pizza has a diameter of $24 \mathrm{cm}$. This week they want to eat different things on their pizza, so they decide to order two small pizzas. The small pizza has a diameter of $12 \mathrm{cm}$. They want to know if there is the same amount of pizza in two small pizzas as in one large. Work out the answer. Take $\mathrm{\pi }=\frac{22}{7}$