We've all seen circles before. They have this perfectly round shape, which makes them perfect for hoola-hooping!Every circle has a center, which is a point that lies exactly at the... well... center of the circle. A circle is a shape where distance from the center to the edge of the circle is always the same:
Answer:
Step-by-step explanation:
Answer:

Step-by-step explanation:
Triangle

Semicircle

because both semicircle are the same just multiply by 2

Now add all together

Answer:
30=30
Step-by-step explanation:
First, do the multiplication in the parenthesis. Then multiply the answer by 2. Do the same on the other side. Hope it helps!
Answer:
You need 40 packs of stickers.
Step-by-step explanation:
20x10=200 stickers
Double it and you'll get 40x10=400