Answer:
DF=20
Step-by-step explanation:
=
Use cross Multiplication
9DF=180
Divide 180 by 9
DF=20
Hope this helps! :)
Answer:
a ball bouncing off a wall
Step-by-step explanation:
Answer: With that assumption, we have a square, whose area is given by the formula Asquare=a2, and two semicircles. The distance D is simply the square's diagonal. The area of each semicircle is given by the formula Asemicircle=π*r2/2. then you will get your answer!
I didn't really get the which part because we shape it to serveral factors, this is one of them