A beautiful solution to the Basel Problem (1+1/4+1/9+1/16+...) using Euclidian geometry. Unlike many more common proofs, this one makes it very clear why pi is involved in the answer.

A beautiful solution to the Basel Problem (1+1/4+1/9+1/16+...) using Euclidian geometry. Unlike many more common proofs, this one makes it very clear why pi is involved in the answer.

In this short video we will answer a standardized math test question using similar triangles to find a unknown angle. We will begin by reviewing the definition of similar figures. We will identify the corresponding angles and use the...

In this shorts video we will answer a standardized math test question using similarity. We will begin by identifying key information given in the problem and by defining similar figures. We will use this definition to identify the...

In this shorts video we will find an unknown side length. We are given a pair of triangles and told they are similar figures. Using the definition of similar figures, similar figures have corresponding sides that are proportional, we...

In this short math video we will discuss similar triangles & proportionality. We will understand that if two figures are similar that their corresponding sides are proportional. We will identify the corresponding sides and write a...

Pupil outcome: I can understand how maths is used by astrophysicists. Key learning points: - It may not be practical to physically land on different planets - It is possible to use trigonometry to determine terrain features - This is...

Pupil outcome: I can understand the minimum information required to describe an enlargement Key learning points: - The scale factor is the multiplier. - The centre of enlargement defines where the image will be placed in relation to the...

Pupil outcome: You can identify and describe the relationship between two irregular polygons using scale factors Key learning points: - Two similar shapes can be described as being 'x' times greater or smaller than each other. - If one...

Pupil outcome: I can use ratios to divide a line segment and find the coordinates of a point on the line. Key learning points: - Your knowledge of ratios can be applied here. - The ratio can be applied to both the x and y distances. -...

In this video, we investigate how and why geometric mean can be used to find missing side lengths in certain triangles.

This video explains how to tell whether 2 triangles are congruent using 4 rules: SSS, SAS, AAS, RHS.



This video is suitable for maths courses around
the world.
KS3 - Not
on your course
GCSE Foundation -
All on...

In this math video we will discuss similar triangles & slope. We will be presented with the graph of a line and two triangles arranged with their longest side on the line. We will have four statements to choose the one statement that...

In this math video we will determine the correct dimensions of similar triangles. We will begin by reviewing the definition of similar figures. Similar figures have corresponding angles that are congruent and corresponding sides that are...

Nobel Laureate Roger Penrose, University of Oxford, summarizes the core aspects of his theory of Conformal Cyclic Cosmology (CCC).

Is there (always) a line that passes through exactly 2 points?

In this video, the teacher reviews how to find angles in triangles using the triangle angle sum theorem. The teacher walks through four parts of a standardized math test question, showing step-by-step how to find missing angle...

In this video lesson, we explore similar figures and indirect measurement in math. We learn about corresponding sides and angles, how to use similarity to solve problems, and even how to find the height of an object using indirect...

In this video, students learn how to find the coordinates of points along a straight line using similar triangles. They are taught to set up ratios with the vertical side (rise) first and the horizontal side (run) second.

This video is a comprehensive lesson on circle theorems, including an extension on the topic. The presenter covers the key four circle theorems that students should know, including the arrow shape, bow shape, quadrilateral, and...

In this lesson, students learn how to solve real-world problems involving similarity criteria. Using the example of finding the distance across a canyon, they apply the vertical angle theorem and angle-angle similarity postulate to...

In this lesson you will learn how to prove the Pythagorean Theorem by using similar triangles.

In this video, the teacher explains the concept of Y equals MX and where it comes from. They use the idea of similar triangles to derive the equation. The lesson emphasizes that the equation represents a line passing through the origin...

In this video, the teacher explains how to find missing measures in triangles using congruence and similarity criteria. They cover different congruence criteria, such as side-side-side and angle-side-angle, as well as similarity criteria...