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:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Given

perimeter =60 cm

semi perimeter =

2

60

=30 cm.

Therefore the length of each side.

a+a+a=60

⇒3a=60

⇒a=

3

60

⇒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

⇒ Area =10×10

3

⇒ Area = 100

3

cm

2

∴ so, the answer is D. 100

3

cm

2

Hope it's helps.. ⚡♦️