If 2 triangles are similar, the ratio of one side of the triangle to the corresponding side of the other is always same for all 3 sides.
We can make use of this rule to calculate the length of sides.
From the image,
3 / 15 = 6 / x
Simplify,
1 / 5 = 6 / x
Use cross method to solve this.
5 x 6 = 1 x x
X = 30
Therefore the length of x is 30ft., A.
The second one
Hope this helps :D
Answer:
7:9
Step-by-step explanation:
Just divide 35 and 45 by 5.
3x - 12
3(3x/3 - 12/3)
3(x - 4)
The answer is: 3(x - 4).