Let’s discover some more circle theorems so that we can solve all types of geometrical puzzles. We discovered these 4 theorems in part 1: Angle at the centre is double the angle at the circumference The angle in a semi-circle is 90...

In this video, we define the different parts of the circle with the correct notation.

In this video, we try to build a conceptual understanding of how to find arc length of a circle using a the proportion strategy or the equation strategy. *Important note: the arc measure is independent of the radius! *In the example at...

👉 Learn how to solve problems with arc lengths. You will learn how to find the arc length of a sector, the angle of a sector, or the radius of a circle. An arc of a circle is the curve between a pair of points on the circumference of the...

The video teaches basic terminologies and concepts related to circles, using a circular park as an example. It covers the definitions of a circle, radius, diameter, chord, secant, segment, arc, circumference, tangent, and sector. It also...

This video explains the different parts of a circle such as the arc, segment and chord. Practice questions and answers are at the end of the video.

This video provides an electric presentation on sectors and arc lengths of circles. The presenter explains the key information needed to understand the topic, including the circumference and area formulas of a circle. The presentation...

This video is a lecture presentation on the definitions of different parts of a circle. The presenter explains the concept of circle parts and their importance in geometry. The video covers eight components that are essential in...

This Video Explains the formula related to Area, Circumferences, arc, sector of a circle

This video is a tutorial on how to calculate the area and circumference of circles using formulas such as pi times the radius squared or pi times the diameter of the circle. The video explains the importance of rounding the final answer...

SchoolOnline's Secondary Maths videos are brilliant, bite-size tutorial videos delivered by examiners. Ideal for ages 13-17, they cover every key topic and sub topic covered in GCSE Maths in clear and easy to follow...

Learn how to solve problems with tangent line. A tangent line to a circle is a line that touches the circle at exactly one point. The tangent line to a circle makes a right angle with the radius of the circle at the point of its...

Learn how to solve problems with chords. A chord is a line that has its two endpoints on the circle. A chord passing through the center of the circle is refered to as the diameter of the circle. A chord divides the circle into two...

SchoolOnline's Secondary Maths videos are brilliant, bite-size tutorial videos delivered by examiners. Ideal for ages 13-17, they cover every key topic and sub topic covered in GCSE Maths in clear and easy to follow...

Learn the essential definitions of the parts of a circle. A secant line to a circle is a line that crosses exactly two points on the circle while a tangent line to a circle is a line that touches exactly one point on the circle. A chord...

Introduction to the derivatives of polynomial terms and trigonometric functions thought about geometrically and intuitively. The goal is for these formulas to feel like something the student could have discovered, rather than something...

This video provides an overview of the different components of a circle and their definitions. The video explains the circumference, diameter, radius, sector, arc, tangent, and chord of a circle, and how they relate to each other. The...

Learn how to solve problems with tangent line. A tangent line to a circle is a line that touches the circle at exactly one point. The tangent line to a circle makes a right angle with the radius of the circle at the point of its...

👉 Learn about angles in trigonometry. An angle is the figure formed by two rays sharing the same endpoint. The two rays are called the sides of the angle while the common endpoint of the two rays is called the vertex of the angle. Angle...

👉 Learn about angles in trigonometry. An angle is the figure formed by two rays sharing the same endpoint. The two rays are called the sides of the angle while the common endpoint of the two rays is called the vertex of the angle. Angle...

In this video lesson, students will learn about measuring angles in radians. They will understand that the radian measure of an angle is found by dividing the arc length by the radius of a circle. The video explains the concept of...

Thanks to Hyeong-jun (H. J.) for emailing me this problem! This is a challenging problem from the math section of the 1997 CSAT, a standardized test in South Korea. Can you figure it out? It took me several attempts, but it was really...

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...

CREDITS Animation & Design: Murray Knox Narration: Lucy Billings Script: Lucy Billings In these 3 videos we are going to discover 9 different circle theorems. I’m a big fan of them - they’re like little logic puzzles. Before we get...