Question

Find the area of an equilateral triangle with side 10cm.​

Answer 1

Answer:

25√3

Step-by-step explanation:

area of equilateral triangle =√3/4asquare

=√3/4×10×10

= 25√3

Answer 2

Answer:

Step-by-step explanation:

Area of an equilateral triangle with a side 10cm.​

In an equilateral triangle side = 10cm

Three sides are equal  a=10

A+B+C=a=10cm

Area of an equilateral triangle

$A=\frac{\sqrt{3 }a^{2} }{4}$

$A=\frac{\sqrt{3 }(10)^{2} }{4}$

$A=\frac{\sqrt{3 }(10)(10) }{4}$

$A={\sqrt{3 }(5)(5) }$

$A=25{\sqrt{3 }$

Area of an equilateral triangle is $25{\sqrt{3 }$