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Study Guide: Geometry and Solid Figures: Circles
Source: https://www.fatskills.com/geometry/chapter/geometry-and-solid-figures-circles

Geometry and Solid Figures: Circles

By Fatskills Exam Guides Team — the exam nerds behind 28,500+ quizzes and 2.1M practice questions across 500+ global exams.

⏱️ ~1 min read

image

In a circle, variable image is usually used for the radius and image for diameter.

-  image (image is about 3.14)
    
Examples:

Example 1.

  image

Find the area of this circle. image
Solution:

Use area formula: image
image, image
Then: image

Example 2. 

image

Find the Circumference of this circle. image
Solution:

Use Circumference formula: image
image
image, Then: image

Example 3.

  image

Find the area of this circle.
Solution:

Use area formula: image
image, Then: image, image
image


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Solid Figures Geometry Basics Geometry Practice Test Midpoint Formula Parallel Lines cut by a Transversal Triangles Adjacent and Vertical Angles Perimeter, Circumference, and Area Forumlas Angles Pythagoras Theorem

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