Question

If the perimeter of an equilateral triangle is 20 m, then find its area.​

Answer 1

Answer:

There are plenty of methods but all give the same answer. Take for example the Heron’s formula.

Semiperimeter =s=20+20+202=30m

Thus the area =A=(√s(s−a)(s−b)(s−c))

=(√30×10×10×10×m4)=1003–√m2 =173.2m2

a,b,c are the sides of the triangle.