Unit Plan
CK-12 Foundation

Ck 12: Geometry: Area of a Circle

For Students 6th - 8th
[Free Registration/Login may be required to access all resource tools.] In this lesson students find the area of a circle given its radius or diameter. Students examine guided notes, review guided practice, watch instructional videos and...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Area of a Circle

For Students 6th - 8th
[Free Registration/Login may be required to access all resource tools.] In this lesson students find the area of a circle given the radius or the diameter. Students examine guided notes, review guided practice, watch instructional videos...
Unit Plan
Khan Academy

Khan Academy: Area of a Circle

For Students 6th - 8th Standards
Find the area of a circle given its radius, diameter, or circumference. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
BBC

Bbc: Circumference and Area of a Circle

For Students 5th - 8th Standards
This is where you can pick up some valuable pointers on how to find the circumference and area of a circle. There is also information on how to find the perimeter and area of a semicircle. When you finish working your way through the...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Area of a Circle

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] In this lesson students find the area of a circle given the radius or the diameter. Students examine guided notes, review guided practice, watch instructional videos...
Unit Plan
Sophia Learning

Sophia: Finding a Formula for the Surface Area of a Cone

For Students 9th - 10th
This video tutorial demonstrates how to find the formula for the surface area of a cone.
Unknown Type
Khan Academy

Khan Academy: Area of a Circle

For Students 7th Standards
Practice finding the area of circle.
Study Guide
Oswego City School District

Regents Exam Prep Center: Area of Polygons and Circles

For Teachers 3rd - 6th Standards
How would you find the area of a polygon or circle? Explore this concept with engaging activities at this test prep site. Here you will find detailed problem solving strategies with accompanying visuals, a reference table with formulas,...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Radius or Diameter of a Circle Given Area

For Students 6th - 7th
[Free Registration/Login may be required to access all resource tools.] Find the radius or diameter of a circle given its area.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Radius or Diameter of a Circle Given Area

For Students 7th
[Free Registration/Login may be required to access all resource tools.] Find the radius or diameter of a circle given the area of the circle
Activity
Mathematics Archives

Math Archives: Visual Calculus: Area of a Circle

For Students 9th - 10th
Students will be able to use The Method of Exhaustion and find the area of a circle by illustrating graphically.
Activity
Discovery Education

Discovery Education: Web Math: Find Out Things About Circles

For Students 9th - 10th Standards
This WebMath site will assist with finding the radius, diameter, circumference, and area of a circle.
Unit Plan
Khan Academy

Khan Academy: Circumference of a Circle

For Students 6th - 8th
Find the circumference of a circle when given either the radius or diameter.Find the radius or diameter of a circle when given the circumference.Students receive immediate feedback and have the opportunity to try questions repeatedly,...
Unknown Type
Khan Academy

Khan Academy: Circumference of a Circle

For Students 7th Standards
Practice finding the circumference of a circle.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Area of a Sector

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] Find the area of a sector of a circle.
Activity
Oswego City School District

Regents Exam Prep Center: Circles: Area of Sectors and Segments

For Teachers 9th - 10th
Material to supplement classroom instruction on sectors and segments of circles. Find guidelines on how to find the area of sectors and segments, as well as a multiple-choice quiz, and an activity idea called "Sectors and Pizza."
Unit Plan
Sophia Learning

Sophia: Sector Area of a Circle: Lesson 2

For Students 9th - 10th Standards
This lesson will demonstrate how to find the area and radius of a circle when given the sector area and central angle measure. It is 2 of 8 in the series titled "Sector Area of a Circle."
PPT
Sophia Learning

Sophia: Sector Area of a Circle: Lesson 4

For Students 9th - 10th Standards
This lesson will demonstrate how to find the area and radius of a circle when given the sector area and central angle measure. It is 4 of 8 in the series titled "Sector Area of a Circle."
Unit Plan
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Area of a Cone

For Students 9th - 10th Standards
This question and answer site is about finding the area of a cone when the height and the angle at the convergence point are given. The site goes on to explain how a cone relates to a circle.
Activity
National Council of Teachers of Mathematics

The Math Forum: Find the Area of the Shape!

For Students 3rd - 8th Standards
Try to figure out the area of this challenging shape. In order to view the images, you will need to use JavaSketchpad.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Area of Sectors and Segments

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] In this lesson students find the area of a sector or segment. Students examine guided notes, review guided practice, watch instructional videos and attempt practice...
Activity
Maths Challenge

Maths challenge.net: Semi Circle Lunes

For Students 9th - 10th Standards
A lune of a circle is defined and a problem of finding the area of two lunes is given.
Unknown Type
University of Waterloo (Canada)

University of Waterloo: Cemc: Math Circles: 3 D Geometry Ii [Pdf]

For Teachers 9th - 10th Standards
This activity provides a variety of 3D geometry questions requiring higher order thinking skills. Questions include; finding the surface area of a prism, surface area of pyramid, surface area of a sphere, and platonic solids.
Unit Plan
Oswego City School District

Regents Exam Prep Center: Circles, Segments, and Area

For Students 9th - 10th Standards
A wealth of resources to supplement instruction on parts of the circle. Find lessons describing chords, tangents, secants, and segments, as well as related practice quizzes and classroom activities.