Help Randy's circular garden has a radius of 4 feet. He wants to put a fence around the entire garden.
How much fencing will he need?
(a)
A 16 feet of fencing
B 20.4 feet of fencing
© 25.12 feet of fencing
D 37.16 feet of fencing
<
(b)
If fencing material costs $0.75 per foot, how much will it cost Randy to build the fence?
$

(a)25.12 (b)$18.84

Step-by-step explanation:

(a) The circumference or perimeter of a circle is . Since we know that the radius of the garden is 4 we find that the circumference of the garden is , but we can round to 3.14, which gives us C 25.12 feet of fencing.

(b) We can plug in the circumference of the circle which we found in the first question into the equation which gives us or $18.84.

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl