3Blue1Brown
Why is pi here? And why is it squared? A geometric answer to the Basel problem
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.
3Blue1Brown
Why is pi here? And why is it squared? A geometric answer to the Basel problem
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.
Curated Video
GCSE Maths - Congruent Triangle Rules #103
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 your course GCSE Higher -...
Curated Video
Similar Triangles & Slope | 8.EE.B.6
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...
Curated Video
Dimensions of Similar Triangles | 8.G.A.4
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...
Curated Video
Conformal Cyclic Cosmology
Nobel Laureate Roger Penrose, University of Oxford, summarizes the core aspects of his theory of Conformal Cyclic Cosmology (CCC).
Zach Star
Is there (always) a line that passes through exactly 2 points?
Is there (always) a line that passes through exactly 2 points?
Curated Video
Angles of Triangles and Similarity
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...
Curated Video
Similar Figures, Angle-Angle Similarity and Indirect Measurement
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...
Curated Video
Finding Coordinates of Points on a Straight Line Using Similar Triangles
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.
KnowMo
Circle Theorems Extension: Intersecting Chords and Beyond
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...
Curated Video
Using Similarity Criteria to Find the Distance Across a Canyon
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...
Curated Video
Deriving the Equation Y = MX 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...
Curated Video
Prove the Pythagorean Theorem: using similar triangles
In this lesson you will learn how to prove the Pythagorean Theorem by using similar triangles.
Curated Video
Finding Missing Measures in Triangles
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...
Brian McLogan
What are the special segments of similar triangles
👉 Learn how to solve with similar triangles. Two triangles are said to be similar if the corresponding angles are congruent (equal). Note that two triangles are similar does not imply that the length of the sides are equal but the sides...
Brian McLogan
ACT SAT Prep How to determine the perimeter of a triangle using similar triangles
ACT SAT Prep How to determine the perimeter of a triangle using similar triangles
Curated Video
Using Similarity Criteria to Find an Indirect Measure
In this lesson, students will learn how to find the height of a school using indirect measurement and similarity criteria. By using a mirror and measuring distances, students can determine the height of the school by comparing similar...
Curated Video
Determining Similarity of Triangles by Examining Corresponding Parts
In this video lesson, students learn how to determine if two triangles are similar by examining their corresponding parts. They review the four similarity transformations and understand that similar triangles have the same shape but not...
Physics Girl
Trig Review for Physics - Common Math Tools - Physics 101, AP Physics 1 Review with Physics Girl
Exercises in this video: Problem 1: 1. You are running north-east at a speed of 4 m/s. What component of your velocity is north? How about east? Problem 2: You are kite-surfing and your kite is pulling you upwards at an angle of 60º with...
Curated Video
Proving the Concurrency of Medians Theorem
In this lesson, students will learn how to prove the concurrency of medians theorem using parallel lines and properties of similar triangles. They will explore the concept of medians, midsegments, and midpoints in triangles, and...
Brian McLogan
What are proportional and congruent parts of parallel lines
👉 Learn how to solve for an unknown measure using parallel sides. When two parallel lines are cut by a transversal, there are some congruents angles that are formed. Some of the congruents angles formed include the corresponding angle,...
Brian McLogan
How to determine if points create similar triangles using the distance formula
👉 Learn how to determine whether two triangles are similar given the coordinate points of the vertices of the triangle. Two triangles are said to be equal when the corresponding angles of the triangles are congruent (equal) or when the...
Curated Video
Understanding Tangent Values in Right Triangles through Similar Triangles
In this video, we learn how to find the tangent value of an acute angle in a right triangle by using the ratios of the triangle's sides. The tangent value is found by dividing the length of the opposite leg by the length of the adjacent...