Unit 1: Day 4

Day 4: Using the equations from Day 3

 Prism: To find the SA of a prism, combine the area of the 2 bases and the area of the sides. 

Pyramid:To find the SA of a pyramid, take the base area, and add 1/2 x base perimeter x slant height.

Cylinder: To find the SA of a cylinder, take the area of the bases and add 2πrh (radius and height).

Cone: To find the SA of a cone, take the area of the base and add πrL (radius and slant height).

Sphere: To find the SA of a sphere, use the equation 4πr².

Youtube Video!

Quiz Time!

1. What is the SA of this cone given

s=16

h=9

r=4

2. Find the SA of the basic prism

3. Find the SA of the sphere given the radius is 13.

ANSWERS TO THE QUIZ: 

1. The surface area of the cone is 251. 2 units squared (Area of base + 3.14 R S) 

2. The surface area of the rectangular prism is 72 feet squared ( area of all sides) 

3. The surface area of the sphere is 2122.64 units squared. (4* 3.14* R squared)