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AREA CALCULATIONS
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In this module we will focus on how to calculate areas of triangles, squares and circles.
In many circumstances we have to calculate unknown sides in the figure in which we are suppose to find the area.
Pythagoras theorem is an effective tool for such a purpose. |
Let us study how to calculate the area of a triangle:
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Let us study some exercises:
a)
| We shall calculate the area of the triangle given by: |
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| We can then use the formula for the area of a triangle: |
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b)
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We shall find the area of this isosceles triangle. Note that the height of the triangle divides the baseline into two equally long lines.
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To be able to find the area of this triangle we have to calculate the height, h. This is done by using Pythagoras theorem.
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We can then find the area of the triangle.
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We can often calculate the area of a quadrangle by adding the areas of the two triangles that form the quadrangle
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