3. Which of the following represents the lengths of the sides of a right triangle?
A 4, 5, and 6
B 12, 15, and 18
C 21, 28, and 35
D 20, 25, and 30

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation:

both equations and proportions are better.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.