Unit 10 – Length, perimeter and area
2 Winston wants to find the areas of these shapes.
(a) Which area will be easiest to find? Which will be most difficult? Explain why. (b) Find the area of the hexagon and the triangle. (c) Estimate the area of the semi-circle. The area of a rectangle is 24 cm². Sketch some possible rectangles on grid paper or use a geoboard. What connection do you notice between the dimensions of the rectangles and their areas? Use a computer drawing package. Design a rectangular flag with four shapes so that the following information is true: The area of shape A is three times as large as the area of shape B. The area of shape C is an odd number of squares. One of shapes has more than four straight sides. The total area of your flag is smaller than 60 unit².
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