Question

find the area of an equilateral triangle of a side 5 cm correct to two places of decimal. ( use /sqrt 3 = 1.732 )​

Answer 1

area is √3/4(a^2)

=1.732/4×25

=10.825

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Answer 2

Answer:

Area of equilateral triangle = (√3/4) a²

= (1.732/4) × 5²

= 0.433 × 25

= 10.825 cm²

To find area correct to two places of decimal, we take only 10.82 cm²

So your answer is 10.82 cm²

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