Answer:
Part 1) The area of the circle is 
Part 2) The circumference of the circle is 
Step-by-step explanation:
step 1
The area of a circle is equal to

we have
---> the radius is half the diameter

substitute


step 2
The circumference of a circle is equal to

we have

substitute


Answer:
y=-x/5 =3/5. that is how it is.
Because a rectangular pyramid's base is square, the cross section would be as well
Answer:
it is congruent by SAS axiom
So go with option A
Congruent -SAS
Hope it will help :)❤