Answer:
Step-by-step explanation:
The circumference of a circle in terms of the diameter is
If our diameter is 29 feet, then the circumference, in terms of pi is
.
If we are multiplying in pi as 3.14, then it is
C = 91.06 ft
The area formula for a circle is
If the diameter is 29, then the radius is half of that at 14.5 feet. Filling in:
so, in terms of pi, the area is
or if you multiply pi in as 3.14, then you get:
Question 8:
Your choice is correct: two figures are similar if all correspondant sides are in the same ratio.
In your case, the figure on the right have correspondant sides which are all three times the figure on the left, since
So, the two figures are similar and their ratio is 1:3.
Question 9:
We follow exactly the same approach: let's see if the radii and the heights are in the same ratio: the radii are in ratio
While the heights are in ratio
So, the answer is again yes, they are similar, and the ratio is 1.6.