This video explains how to find the circumference of a circle when given either the diameter or the radius. We also explain you how the formula is derived. Practice questions and solutions at the end of the video.

DESCRIPTION: There are some key words we need to know for circles: radius, circumference, diameter, sector, segment, tangent, chord and arc. In this video we discover what they all mean. The radius is the distance from the centre of a...

This video lesson will review key vocabulary terms about circles and finding circumference of circles and semicircles. Students will learn how to describe a circle in terms of radius and diameter, understand the concept of pi, and find...

This video explains how to find the area and circumference of a circle using the radius or the diameter.



This video is suitable for maths courses around
the world.
KS3 - All
on your course
GCSE Foundation -
All...

Learn how to solve problems with arcs of a circle. An arc is a curve made by two points on the circumference of a circle. The measure of an arc corresponds to the central angle made by the two radii from the center of the circle to the...

This video provides a concise overview of the key concepts related to circles, including the radius, diameter, circumference, and area. It also touches on finding the area and volume of cylinders. This video is part of the 8-part series,...

👉 Learn how to find the volume and the surface area of a sphere. A sphere is a perfectly round 3-dimensional object. It is an object with the shape of a round ball. The distance from the center of a sphere to any point on its surface is...

In this video, the teacher explains how to find the circumference of a circle by exploring the ratio of the diameter and circumference. The concept of constant proportionality and the use of pi as an approximate value are also discussed.

👉 Learn how to find the volume and the surface area of a sphere. A sphere is a perfectly round 3-dimensional object. It is an object with the shape of a round ball. The distance from the center of a sphere to any point on its surface is...

In this video, the teacher explains how to find the area of a circle using the circumference. They review the formulas for the area and circumference of a circle and highlight a common mistake in calculating the radius.

This video quiz on the topics covered in the Circles series. The series covered key concepts related to circles, including the radius, diameter, circumference, and area. It also touches on finding the area and volume of...

Master Finding the area and circumference of a circle and shaded regions

ACT SAT Prep Learn how to determine the circumference of a circle

Learn how to write the equation of a circle. A circle is a closed shape such that all points are equidistance (equal distance) from a fixed point. The fixed point is called the center of the circle while the distance between any point of...

Learn how to write the equation of a circle. A circle is a closed shape such that all points are equidistance (equal distance) from a fixed point. The fixed point is called the center of the circle while the distance between any point of...

DESCRIPTION: There are some key words we need to know for circles: radius, circumference, diameter, sector, segment, tangent, chord and arc. In this video we discover what they all mean. The radius is the distance from the centre of a...

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