the perimeter of a equilateral triangle is 120cm. find it area
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2
perimeter of an equilateral triangle is 3× side
120=3×a
120÷3=a
40=a
thus each side of the equilateral triangle is 40cm
area = √ 3/4 a²
=692.82cm²
120=3×a
120÷3=a
40=a
thus each side of the equilateral triangle is 40cm
area = √ 3/4 a²
=692.82cm²
Answered by
2
perimeter of equilateral triangle=120
so that side of triangle =120/3=40cm
therefore , area of equilateral triangle=√3×a^2/4
=√3×40×40/4
=400√3 cm^2 answer
so that side of triangle =120/3=40cm
therefore , area of equilateral triangle=√3×a^2/4
=√3×40×40/4
=400√3 cm^2 answer
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