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10 votes
10 votes
Find the perimeter of the triangle
HELPPPPPP

Find the perimeter of the triangle HELPPPPPP-example-1
User Seif
by
2.1k points

2 Answers

18 votes
18 votes

Answer:

39 inches

Explanation:

the triangle has all equal angles

this means it is equilateral and this also means all the sides are equal

so take 2 sides and set them equal to each other to find x

21 - x = x + 5

now solve

add x to both sides

21 = 2x + 5

subtract 5 to both sides

16 = 2x

divide everything by 2

8 = x

now flip it

x = 8

plug this is to one of the equations and multiply that by 3

8 + 5 = 13

13 * 3 = 39

that is the perimeter

User Mojah
by
2.6k points
21 votes
21 votes

Answer: 4x + 29

Step-by-step explanation: add the like terms together.

User Jon Hanson
by
3.0k points