Diameter
The diameter of a circle is a straight line that passes through the center of the circle and touches two points on the circle. It is the longest distance across the circle. The diameter is exactly twice the length of the radius of the circle.
Formula for Diameter
The formula to calculate the diameter of a circle is:
center;">Diameter (d) = 2 * Radius (r)
Key Points to Remember
- The diameter is the longest chord of the circle.
- The diameter is always twice the length of the radius.
- The diameter is used to calculate the circumference and area of a circle.
Calculating Diameter
To calculate the diameter of a circle, simply multiply the radius by 2.
center;">Diameter (d) = 2 * Radius (r)
Example
Let's consider a circle with a radius of 5 cm. To find the diameter:
center;">Diameter (d) = 2 * 5 cm = 10 cm
Study Tips
To understand the concept of diameter better, practice drawing circles and measuring their diameters. Also, solve problems involving the calculation of the diameter using the formula.
.◂Science Worksheets and Study Guides Eighth Grade. Earthquakes
Worksheet/Answer key
Earthquakes 
Worksheet/Answer key
Earthquakes Worksheet/Answer key
Earthquakes Vocabulary/Answer key
Earthquakes Vocabulary/Answer key
Earthquakes Vocabulary/Answer key
Earthquakes Vocabulary/Answer key
Earthquakes
Worksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
Earth/Space Science: Students will use scientific skills and processes to explain the chemical and physical interactions (i.e., natural forces and cycles, transfer of energy) of the environment, Earth, and the universe that occur over time.
Earth History: Explain how sedimentary rock is formed periodically, embedding plant and animal remains and leaving a record of the sequence in which the plants and animals appeared and disappeared.
Explain how sedimentary rock buried deep enough may be reformed by pressure and heat and these reformed rock layers may be forced up again to become land surface and even mountains.
Explain why some fossils found in the top layers of sedimentary rock are older then those found beneath in lower layers: Folding; Breaking; Uplift; Faulting; Tilting.