Matching
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A
grade 5 student asks you to explain how to calculate the perimeter and then the area of a triangle.
Each side of the triangle is 3 cm long and the height of the triangle is 3.5 cm. Order the steps you
would take to solve the problem.
A. | I calculate the
area by using the formula for a triangle (b x h ¸ 2) to get 5.25 cm2. | B. | The perimeter is 9 cm, and the area is 5.25 cm2. | C. | I measure the perimeter by adding the length of all the sides
together to get 9 cm. | | |
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1.
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What
is the first step?
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2.
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What
is the second step?
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3.
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What
is the final step?
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Palak wants to buy a pool cover for his 3 m x 5 m swimming pool. He also needs a
border around the pool to tack down the cover. The cost of the blanket is $20.00 per square
metre. The cost of the border is $10.00 per metre. Order the steps he will take to find the total
cost.
A. | He measures the perimeter by adding all the sides of the pool
to get 16 m. He calculates the area of the pool by using the formula b x h. So 3 m x 5 m is 15
m2. | B. | The total cost of the blanket and border is
$460.00. | C. | The border will cost $10.00 x 16 m or $160.00, and the blanket
will cost $20.00 x 15 m2, or $ 300.00. | | |
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4.
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What
is the first step?
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5.
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What
is the second step?
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6.
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What
is the final step?
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Multiple Choice
Choose the
correct answer.
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7.
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Francois wants to put boards around his hockey rink. What will he measure to find the
number of boards needed?
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8.
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Jane
Anne needs to fertilize her lawn. One bag of fertilizer covers 5 m2. What will she measure to find the number of bags of fertilizer she
will need for the entire lawn?
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