Question
What is the area of an equilateral triangle whose side is 8 cm?
Answer: Option A
:
A
Semi perimeter of a triangle (s) = a+b+c2
⇒8+8+82=12cm
Area of a triangle = √s(s−a)(s−b)(s−c)
=√12(12−8)(12−8)(12−8)
=√12×4×4×4
=√3×4×4×4×4
= 16√3 cm2
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:
A
Semi perimeter of a triangle (s) = a+b+c2
⇒8+8+82=12cm
Area of a triangle = √s(s−a)(s−b)(s−c)
=√12(12−8)(12−8)(12−8)
=√12×4×4×4
=√3×4×4×4×4
= 16√3 cm2
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