Answer:
C. √2 - 1
Step-by-step explanation:
If we draw a square from the center of the large circle to the center of one of the small circles, we can see that the sides of the square are equal to the radius of the small circle (see attached diagram)
Let r = the radius of the small circle
Using Pythagoras' Theorem
(where a and b are the legs, and c is the hypotenuse, of a right triangle)
to find the diagonal of the square:
So the diagonal of the square =
We are told that the radius of the large circle is 1:
⇒ Diagonal of square + r = 1
Using the quadratic formula to calculate r:
As distance is positive, only
I'd be glad to answer if i knew the question
Set x to 0 to find the y value or set y to 0 to find the x value
The perimeter is.just.the.sides.added.up
6+6+20+28=60
for the area add up the area of the rectangle 20(5)=100 plus the areas of the triangles 4(5)=20
total area = 120