How to Measure a Circle *Radius Diameter & Circumference*
1. Radius: A line segment that goes from the center point to a point on the circle. Thus, it goes halfway through the circle.
2. Diameter: A line segment that goes all the way across a circle through the center point.
3.... Show More >>
How to Measure a Circle *Radius Diameter & Circumference*
1. Radius: A line segment that goes from the center point to a point on the circle. Thus, it goes halfway through the circle.
2. Diameter: A line segment that goes all the way across a circle through the center point.
3. Circumference: The distance around the outside of the circle. #numbers #educationalvideosforkids #math
Finding radius, diameter, and circumference:
The diameter is always twice as long as the radius ; d = 2 x r.
Important formulas: C = 2x Pi xr , C = Pi xd , d = C ÷ Pi
Pi(Pi) is a special number that occurs in circles. Its decimal places keep going and going, but we can use the approximation 3.14. So, in calculations, think Pi ? 3.14.
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