Usually a ratio will compare two numbers by division
D. X=3cm
Since the triangles are similar, just set up a proportion to solve for x.
4/8=x/6. Then just cross multiply and solve from there.
Data:
Formula: diameter = 2*radius
Formula: (<span>Circle length)
</span>
<span>
Solving: </span><span>Using the data
</span>diameter = 2*radius
20 = 2*r
2r = 20
<span>Now, replace in the circumference length formula
</span>
Answer:
<span>
The exact circumference of the circle is </span>
I'm not sure what this question means exactly, maybe the principals goal is unrealistic?
3.5, it is the coefficient and describes how many n there are