Question

11. If the perimeter ofan equilateral triangleis 180 cm. Then its area will b
(а) 900 cm2
Ф)9003 cm2
(c) 3003 cm2
(d) 6003 cm2
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Answer 1

answer:

perimeter is "the sum of all sides" or this is a

equilateral triangle

so perimeter=3×side

180. =3×side

side. =180/3=60

area of equilateral triangle is

A=(√3/4)( side)^2

=(√3/4)(60)^2

=(√3/4)(3600)

=(√3) 900

=900√3 cm^2