Question

A equilateral triangle measures 3 1/2 inches on one side. what is the perimeter of the triangle?

Answer 1

An equilateral triangle is a triangle with all three sides of equal length.

Let consider each side of the equilateral triangle = A

Each side of the equilateral Δ = 3 ×1/2= $\frac{7}{2}$ inches    (given)

Perimeter of the equilateral triangle :-

P = 3A

P = 3 × $\frac{7}{2}$ inches      ( A =  $\frac{7}{2}$ )

P = $\frac{21}{2}$ inches

P = 10. 1/2 inches = 10.5 inches.

Hence the perimeter of  the equilateral triangle is 10.5 inches.

Ans :- The perimeter of  the equilateral triangle is 10.5 inches.

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Answer 2

Answer:

The perimeter of the given equilateral triangle with sides $3\frac{1}{2} inches$ is $10\frac{1}{2} inches$.

Step-by-step explanation:

Given:

Side =  $3\frac{1}{2} inch$

To find:

The perimeter of the triangle (P)

Formula:

$perimeter = side1 + side2 + side3$

Step 1:

The given triangle is equilateral. The sides of an equilateral triangle are equal.

$side1=side2=side3$

Therefore,

$perimeter = 3 * side1$

Step 2:

Substituting the given value, we get

$P = 3 * 3\frac{1}{2}$

$P=3*3.5$

$P=10.5inches$

Therefore, the perimeter of the triangle is 10.5 inches.

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