The triangles below are similar. Find the value of x.

Question

The first triangle has 14 on the right and left side and 18 on the bottom.
The second triangle has 7 on the right and left side and x on the bottom.
A. 9
B. 8
C. 10.5
D. 11
Is the answer B?

Answer 1

14 x 14 x 18
7 x 7 x ?

This must be a proportionate problem. The second triangle lengths are half the lengths of the first triangle. On the top, the greatest common factor is 2. Divide 14, 14, and 18 by 2. This should give the second triangle sides of 7, 7, and 9.

14/2 = 7
14/2 = 7
18/2 = 9

So, the answer is A, and not B.

I hope this helps! :)

Answer 2

Thanks:)

Answer 3

You're welcome, Callie. :)

I had to research how to do proportionate problems, and it helped me quite a bit.

Answer 4

1.A 8:9
2.A 9:5
3.B $0.30
4.A 60km/h
5.D 27
6.B 10
7.D 40
8.B 2/3, 4/9
9.A 9
10.A 2:1

For future or current Connexus kids 10/10 correct