Question

The area of an equilateral triangle is 81 cm2. Its height is​

Answer 1

*Answer:

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please see the attachment.

Answer 2

Answer:

Step-by-step explanation:

Area of equilateral triangle = √3/4a2

√3/4a2  =  36√3  ⇒ a2 = 4 x 36  

⇒  a = root under (4 x 36) = 12cm

Height of equilateral triangle = √3/2a  = √3/2 x 12 = 6√3 cm