5.9

The student will identify and describe the diameter, radius, chord, and circumference of a circle.

Essential Knowledge and Skills  (Full Curriculum Framework for this SOL)

• Identify and describe the diameter, radius, chord, and circumference of a circle.
• Describe the relationship between

                    –  diameter and radius;
                    –  diameter and chord;
                    –  radius and circumference; and
                    –  diameter and circumference.

• The length of the diameter of a circle is twice the length of the radius.

Textbook Correlation

Grade	Lesson(s)	Notes
5	4-4, 4-7	No lesson on chord
4	9-5

Links to Related SOL

K.10   1.10   3.10   4.7   4.8   5.9   6.10   8.11

Online Games and Practice:

quia.com: Radius and Diameter
Match the radius and diameter together

mathgoodies.com: Geometry and the Circle
Mini-lesson and on-line practice

quia.com: Parts of a Circle
Millionaire game

Reference:

misterteacher.com: Interactive Circle
Use to teach parts of circle

lessonsnips.com: About the Circle
Introductory lesson plan

Free Worksheets:

ezschool.com: Circle Worksheet
Pre-made worksheet

mathworksheets4kids.com: Basic Circle Worksheet
Pre-made worksheet

mathworksheets4kids.com: Find Radius
Pre-made worksheet, given diameter, find radius

mathworksheets4kids.com: Find Diameter
Pre-made worksheet, given radius, find diameter