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An equilateral triangle has sides of length (3x + 7). Find the PERIMETER of the triangle
A. There is not
enough information to
solve this problem B.9x2 + 42x + 21
C. 9x + 21
D. 6x2 + 1

Respuesta :

Answer:

C

Step-by-step explanation:

The sides of an equilateral triangle are congruent.

Perimeter (P) is the sum of the 3 sides

P = 3x + 7 + 3x + 7 + 3x + 7 ← collect like terms

 = 9x + 21

rohiraakshay4

The perimeter of equilateral triangle having side 3x+7 is 9x+21. The correct answer is (C).

Perimeter of equilateral triangle:

The perimeter is the total length of of the object or shape.

Equilateral triangle has equal sides and therefore the

Perimeter = 3 x side

How to calculate perimeter of equilateral triangle?

Here we have given that the side of equilateral triangle is = 3x + 7

Therefore the perimeter of this triangle will be 3 times of the side

Perimeter = 3 (3x + 7) = 9x + 21

The final answer is 9x + 21

Hence correct answer is (C).

Find more about perimeter of equilateral triangle here-

https://brainly.com/question/12742216

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