Radius
The radius of a circle is the distance from the center of the circle to any point on its circumference. It is represented by the lowercase letter "r".
To find the radius of a circle, you can use the formula:
r = C / (2π)
Where r is the radius, and C is the circumference of the circle.
Another way to find the radius is by using the formula:
r = √(A / π)
Where r is the radius, and A is the area of the circle.
The radius is an important measurement in geometry and is used to calculate the area, circumference, and diameter of a circle.
Understanding the concept of radius is essential for solving various math problems related to circles and circular objects.
[Radius] Related Worksheets and Study Guides:
.◂Math Worksheets and Study Guides Third Grade. Measurement
Study Guide
Measurement 
Activity Lesson
Measuring Objects Activity Lesson
Mountain Climbing Worksheet/Answer key
Measurement Worksheet/Answer key
Measurement Worksheet/Answer key
Measurement Worksheet/Answer key
Measurement Worksheet/Answer key
Measurement Worksheet/Answer key
Measurement Worksheet/Answer key
Measurement Worksheet/Answer key
Volume and Capacity Worksheet/Answer key
Weight Worksheet/Answer key
Measuring Line Segments Worksheet/Answer key
A Weighty Problem Worksheet/Answer key
Growing Gardens Worksheet/Answer key
Meter Magic Vocabulary/Answer key
Measurement Vocabulary/Answer key
Measurement
Activity LessonActivity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
Measurement (NCTM)
Understand measurable attributes of objects and the units, systems, and processes of measurement.
Understand such attributes as length, area, weight, volume, and size of angle and select the appropriate type of unit for measuring each attribute.
Understand that measurements are approximations and how differences in units affect precision.
Apply appropriate techniques, tools, and formulas to determine measurements.
Select and apply appropriate standard units and tools to measure length, area, volume, weight, time, temperature, and the size of angles.
Connections to the Grade 3 Focal Points (NCTM)
Measurement: Students in grade 3 strengthen their understanding of fractions as they confront problems in linear measurement that call for more precision than the whole unit allowed them in their work in grade 2. They develop their facility in measuring with fractional parts of linear units. Students develop measurement concepts and skills through experiences in analyzing attributes and properties of two-dimensional objects. They form an understanding of perimeter as a measurable attribute and select appropriate units, strategies, and tools to solve problems involving perimeter.