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Term 3
The word perimeter means the length or distance around an object.
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A farmer has a triangular plot of ground. We can find the perimeter of the plot by adding up the lengths of the sides. Perimeter = 12 m + 12 m + 6 m = 30 m |
Find these perimeters.
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Veronica’s garden.
Veronica draws a diagram of the garden she wants to plant.
a. What is the perimeter of the area where she plants her herbs?
b. Which two sections have the same perimeter? What is their perimeter? and have a perimeter of m.
c. She needs a fence around the whole garden. The fencing costs R50 per meter. How much will the fence cost?
Plan your own garden.
Use grid paper from Cut-out 7 to plan your own garden. Show all the measurements and the crops you would like to grow.
Measuring circles.
Work with a partner.
Materials: 10 circular objects of different sizes like a plate, a glass, sticky tape , a bottle cap, string and scissors
1. Choose one of the round objects to measure with the string.
2. Cut a piece of string the exact length that just fits around the object.
3. Now take the same string and stretch it to reach across the circle. Count how many times it fits across.
4. Do the same with other circular objects.
5. Write what you notice.
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The distance around a circle is called the circumference. |
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The distance across a circle is called the diameter. |
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