Question

Please help! I’m very confused on this question. I’m not very good at geometry.

Answer 1

You're probably fine at geometry. This is algebra pretending to be geometry.

The perimeter is the sum of the sides. Geometry part over.

We write the equation:

36 = (2x + 3) + (2x + 3) + 2x

36 = 6x + 6

30 = 6x

x = 5

Lengths of the sides:

common side: 2x+3 = 2(5)+3 = 13

base: 2x = 10

Answer: x=5, base=10, common side=13

Answer 2

Well, to find the perimeter we have to add all of the side lengths, so let's do that:

2x+3 +2x+3 +2x

And we know that this equals 36 so let's solve for x

2x+3+2x+3+2x = 36

6x+6 = 36

6x = 30

x = 5

So we know know that x = 5.

Now all you have to do is plug in the values of x into the lengths

2(5) + 3

= 10+3

= 13 is the length of two of the sides.

2x

= 2(5)

= 10

And 10 is the length of the last side.