Question

the perimeter of an equilateral triangle is 90m find its area
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Answer 1

Answer:

Step-by-step explanation:

P=90m

LENGTH OF ONE SIDE OF A EQUILATERAL TRIANGLE  = 90/3m

                                                                                              = 30m

Answer 2

GIVEN:

• perimeter of an equilateral triangle is 90 m

TO FIND:

• The area of an equilateral triangle.

SOLUTION:

perimeter of equilateral triangle = 90m.

➜ 3a = 90

➜ a = 90/3

➜ a = 30 m

Area of equilateral triangle = √3a²/4

= (√3×30²)/4

= (900√3)/4

➜ 225√3 = 389.71 (approx)

Hence the area of equilateral triangle is 389.71.

ADDITIONAL INFORMATION:

• Lines of symmetry of equilateral triangle are 3
• each angle of equilateral triangle is 60°
• there are three vertices in equilateral triangle