Question

1. A triangle has sides that are of unknown lengths, but if one side is 3x, the other sides are 5x and 6x. Its perimeter is 70 inches.

a. Label the diagram to show the lengths of the sides.






b. Write and solve an equation to find the value of x.





c. Give the lengths of the three sides of the triangle.


d. Show how you check your work to confirm that the perimeter is correct.

Answer 1

a. Start like this

Can you come up with an equation to solve this problem?
Remember that the perimeter is the sum of the lengths of the sides, and it is 70.

Answer 2

No, I'm a little confused..

Answer 3

70 = (3+5+6)x
X = 70/14 = 5

3*5 =15
5*5 =25
6*5 =30

15 + 25 + 30 = 70

Answer 4

Then how would I GIVE THE LENGHTS OF THE THREE SIES OF THE TRANGLE?

Answer 5

SIDES

Answer 6

correct

Answer 7

you did above:
3 x 5 = 15
5 x 5 = 25
6 x 6 = 30
15, 25, 30

Answer 8

SO, that's what I would write down for that?

Answer 9

Then how would I check my work to comfirm that the perimeter is correct?

Answer 10

correct

Answer 11

add all the sides and see if you get 70

Answer 12

How do I do that?

Answer 13

15 + 25 + 30 =