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Sagot :
Answer:
a)7.5cm b)20cm
Step-by-step explanation:
a) ½base times height
b) base times height
The formula to calculate the area of a regular polygon is, Area = (number of sides × length of one side × apothem)/2, where the value of apothem can be calculated using the formula, Apothem = [(length of one side)/{2 ×(tan(180/number of sides))}].
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