# Circles, Cylinders, and Spheres

Taught by muchomath
• Currently 4.0/5 Stars.
9534 views | 2 ratings
Meets NCTM Standards:
Lesson Summary:

In this lesson, Professor Perez covers the basic formulas for calculating the circumference, area, volume of a circle, cylinder, and sphere. Using non-calculator computations, he shows how to find the radius of a circle given its diameter, and how to calculate the volume of a cylinder and sphere given their dimensions. He emphasizes the importance of understanding the formulas and not relying solely on calculators.

Lesson Description:

Performing non-calculator computations in Geometry.

Created by and copyright of Larry Perez. Funded by the state of California through Saddleback College. More information on videos, resources, and lessons at Algebra2Go.

• What is the radius of a circle?
• What is the formula for circumference of a circle and how do you calculate it?
• If the diameter of a circle is 10in., what is its circumference and area?
• What is the formula for area of a circle and how do you calculate it?
• What is a right circular cylinder, and what is the formula for its volume?
• If a cylinder has height 20 in. and base diameter 12 in., how do you find its volume?
• What are the units for volume?
• What is a sphere, and what is the formula for its volume?
• If a sphere has a 10 in. diameter, what is its volume?
• How do you find the volume of a sphere?
• What are some formulas for geometric shapes?
• #### Staff Review

• Currently 3.0/5 Stars.
Formulas for circumference and area of a circle, and volume of a cylinder and sphere are introduced, and some calculations are done without using a calculator. This is a great introduction to basic geometric formulas, and how to plug numbers into them.
• #### shorty4395

• Currently 5.0/5 Stars.
Pretty simple all in all but very interesting and well explained. It helped me with putting in the numbers for the formulas.