30 min of practice:
The goal of this exercise was to find volumes and surface areas of boxes, cylinders, and triangular prisms.
The volume of a cylinder is the area of the base × height.
SURFACE AREA: pi × r^2= pi × 2^2=4 × pi
VOLUME: The areas of the top and the base are simply the area of a circle:pi × r^2 = ? , then multiply by height
This exercise was more difficult than expected. Finally after the 30 minutes, I was able to successfully complete the exercise and earn 475 energy points.
FINDING SURFACE AREA-
pi × r^2= pi × 4^2= 16 pi
circumference: 2(pi)(r)=2(pi) × 4=8(pi)
Surface Area: wh= 8(pi) × 5=40(pi)
TOTAL: 16 (pi) +16(pi)=40(pi)=72(pi)
AREA=(pi)r^2=#(pi) × h=volume
So for the rest of class I found the surface area and volumes for both the cylinder and cone I created. I was having trouble at first with comprehending the formula and how to do it but then I looked at what google had to offer.
A= πr(r+(square root)h^2+r^2)