Type:

Graphic Organizer/Worksheet

Description:

A problem involving the area of a crescent. Many students are surprised to discover that their answers do not involve pi.

Subjects:

  • Mathematics > General
  • Mathematics > Geometry

Education Levels:

  • Grade 6
  • Grade 7
  • Grade 8
  • Grade 9
  • Grade 10
  • Grade 11
  • Grade 12

Keywords:

geometry measurement coordinate conjecture pythagorean theorum trapezoid triangle triangles

Language:

English

Access Privileges:

Public - Available to anyone

License Deed:

Creative Commons Attribution 3.0

Collections:

Geometry
Update Standards?

CCSS.Math.Content.7.G.B.4: Common Core State Standards for Mathematics

Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.
Curriki Rating
On a scale of 0 to 3
3
On a scale of 0 to 3

This resource was reviewed using the Curriki Review rubric and received an overall Curriki Review System rating of 3, as of 2009-07-26.

Component Ratings:

Technical Completeness: 3
Content Accuracy: 3
Appropriate Pedagogy: 3

Reviewer Comments:

This interesting exercise will be better than interesting to top students - there is real mathematics going on right under the students’ noses. But all students should understand the proof and be able to extend it to arbitrary-sized circles.

Not Rated Yet.

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