Question

9.The side of an equilateral triangle is 6cm.finds it's area.​

Answer 1

Answer:

Semi perimeter = a+b+c /2

= 6+6+6/2

= 18/2

= 9 cm

By using heron's formula

Area = √ S (S-a) (S-b) ( S-c)

√ 9 (9-6) (9-6) (9-6)

√ 9 (3) (3) (3)

√ (3*3) (3) (3) (3) ( Common )

3*3 √3

9 √3 cm² answer

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Answer 2

Answer:

hope so it will helpful to you