Question

find the area of an equilateral triangle each of whose side is 10 centimetre

Answer 1

Equilateral Triangle:

Side,a=10cm

Area:√3/4×a×a

=√3/4×10×10

=√3×5×5

=25√3sq.cm

Thus,area of equilateral Triangle is 25√3sq.cm

Answer 2

Information provided to us:

Each side of the equilateral triangle = 10 cm

To Calculate:

The area of the given equilateral triangle

Calculation:

We know that area of an equilateral triangle is equal to ( √3 / 4 ) * ( side ) ^ 2.

Substituting the values provided to us, in the above equation,

Area of the given equilateral triangle = ( √3 / 4 ) * ( 10 ) ^ 2
Area of the given equilateral triangle = ( √3 / 4 ) * 100
Area of the given equilateral triangle = √3 * 25
Area of the given equilateral triangle = 25√3 cu. cm

Area of the given equilateral triangle = 25 * 1.732

Area of the given equilateral triangle = 43.3 cu. cm