Circles, Cylinders, and Spheres

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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.

Additional Resources:
Questions answered by this video:
  • 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.