Should be 49^2 = 36^2 + 25^2, or something like that.
Step-by-step explanation:
step 1. the area of a circle is A. A = (pi)r^2.
step 2. if the diameter is 8 cm then the radius is 4 cm.
step 3. A = (pi)4^2
step 4. A = 16(pi) = 50.24 cm.
Answer:
D
Step-by-step explanation:
For a circle, the equation of the circumference is c = π * 2r (radius). Since in this case, the circumference is 15.3, that means π * 2r = 15.3. I'm going to assume that pi is 3.14 because the four answers aren't particularly close to each other. This means that 2r = approx. 4.872. If you then divide both sides by 2 you get r = approx. 2.436, which is closest to answer D.
A because 2(5) is 10 + 4(3) is 12 which makes 22 and 6(5) is 30 + 2(3)=6 which makes 36. Finally, both are now true with that ordered pair making it the answer.
