Question

If the perimeter of an equilateral triangle is 60 cm then what is perimeter of the triangle formed by joining the midpoints of the sides of the equilateral triangle

Answer 1

Answer:

Heron's Formula

Area of a Triangle

The perimeter of an equilat...

MATHS

The perimeter of an equilateral triangle is 60 cm, then the area is 

A

103 cm2

B

153 cm2

C

203 cm2

D

1003 cm2

Correct Answer

MEDIUM

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ANSWER

Given

perimeter =60 cm

semi perimeter =260=30 cm.

Therefore the length of each side.

a+a+a=60

⇒3a=60

⇒a=360

⇒a=20

∴ Area = s(s−a)(s−b)(s−c)

⇒ Area = 30(30−20)(30−20)(30−20)

⇒ Area = 30×10×10×10

⇒ Area = 3×10×10×10×10

hope this will help u out there