Question

Find the area of an equilateral triangles whose perimeter is equal to 18

Answer 1

Answer:

6

Step-by-step explanation:

eqalateral means eqal sides

so, 18/3 u will get 6

Answer 2

Answer:

let sides of equi. triangle = a

3a = 18 . [ given ]

so, a = 6

$area \: of \: equi \: triangle \: = \sqrt{3} {a}^{2} \div 4$

so, area =

$\sqrt{3} \times 36 \div 4 = \sqrt{3 } \times 9 = 9 \sqrt{3}$ square unit