Asked by Emma

A regular pentagon and an equilateral triangle have the same perimeter. The perimeter of the pentagon is 5 (1/2x +2) inches. The perimeter of the triangle is 4(x-2) inches. What is the perimeter of each figure?
Answered by matty
so 5(.5x + 2) = 4(x-2)
distributive property gives you
2.5x+10=4x-8
add eight to both sides
2.5X+18=4x
Subtract 2.5x from both sides.
18=1.5x
Simplifying this means that x=12. Now we plug x back into the previous two equations and we get 40. So the perimeter of the pentagon and triangle are 40
Answered by matty
sorry I’m not very great at explaining the process.
Answered by oobleck
well, they have the same perimeter, so

5(1/2 x + 2) = 4(x-2)
x = 12
...
Answered by Emma
OMG Thank you soooo much!!
Answered by UNKNOW
THINK U SO MUCH IN KNOW HOW TO DO THIS
Answered by hi
hiii thanks! I learnt alot!! <3 :)
Answered by Roblox
OMG THX SO MUCH NOW IK HOW TO DO IT! OMG <3 :D
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