Let's Tute
Constructing Perpendicular Bisector of a Line Segment
In this video you will learn How to construct tangents to a circle from a point outside a circle - Geometric Constructions
TED Talks
TED: A creative approach to community climate action | Xavier Cortada
When he learned of the threat that rising sea levels posed to his coastal hometown of Miami, Florida, eco-artist Xavier Cortada founded a movement around beautifully designed elevation markers highlighting the risk of flood damage. The...
Institute of Human Anatomy
Exploring the Educational Legacy of a Donated Fetus
In this video, a teacher discusses the educational value of cadavers in anatomy labs, specifically focusing on a fetus that was donated to them. They explore the developmental features of the fetus and estimate its gestational age, while...
Crash Course
The Poetry of Sylvia Plath: Crash Course Literature 216
In which John Green teaches you about the poetry of Sylvia Plath. When a lot of people think about Sylvia Plath, they think about her struggles with mental illness and her eventual suicide. Her actual work can get lost in the shuffle a...
Curated Video
Writing Equations for Right Triangles using the Pythagorean Theorem
This is a tutorial video on how to write equations to solve for the unknown or missing side lengths of right triangles. The video explains the Pythagorean Theorem and the properties of right triangles, such as legs, hypotenuse, and the...
Weird History
Alaskan Frontier Recipes
Alaska became the 49th state to join the United States in 1959. Far removed from the contiguous US, Alaska remains the "last frontier" in many ways - including in the kitchen.
Let's Tute
Introduction To Statistics Basics - Data Collection
In this online video lecture and tutorial on Geometric Constructions you will learn how to construct a triangle similar to a give triangle according to the given scale factor.
JJ Medicine
Sickle Cell Disease | Pathophysiology, Symptoms and Treatment
Lesson on sickle cell disease. Sickle cell disease is a group of heritable blood disorders with characteristic sickle-cell shaped red blood cells. Sickle cell disease leads to chronic, compensated hemolytic anemia with vaso-occlusion...
Curated Video
Proving e = 2.718... Is An Irrational Number (3 Methods)
A rational number can be written as a ratio of two integers a/b. An irrational number cannot be written as such a ratio. Euler's number, e = 2.718.., is an irrational number. This video illustrates 3 methods to prove e is an irrational...
Curated Video
Baseball's Home Plate Is IMPOSSIBLE Mathematically
Home base is defined by a geometric construction. Take a square whose side is 17" and then remove two corners. The adjacent sides are 8.5", and the two remaining sides are 12" and meet at a right angle. The only problem: this is an...
Curated Video
The "Fibonacci" Sequence Was Actually Discovered In India 1000 Years Earlier
The sequence of numbers 1, 1, 2, 3, 5, 8, 13, etc was described by Fibonacci around 1200 AD. The Indian mathematician Pingala found the sequence at least 1,000 years before (probably 200 BC) while analyzing Sanskrit poetry. This video...
Curated Video
Tricky Umbrella Question Stumps Scottish Students
Some Scottish students felt the National 5 Maths Exam was too difficult, particularly this tricky umbrella question. The test is not yet released, so I have re-constructed the problem as best as I could from accounts of the exam. Here is...
Brightstorm
Duplicating a Line Segment
Geometric constructions use simple tools to do complex things. Introduce learners to constructions by copying a segment. A concept video features the proper procedure for performing constructions, so young mathematicans...
Corbett Maths
Construct a 90 Degree Angle
There is more than one way to create a 90-degree angle. Using a compass and a straightedge, the video shows two ways to construct a right angle. The ways include using perpendicular bisectors and circle theorems. To wrap up, pupils...
Corbett Maths
Perpendicular Through a Point on a Line
Use one construction to complete a second. The short video shows how to incorporate the steps of a perpendicular bisector to create a perpendicular to a point on a line. With their own straightedges and compasses, classmates then...
Corbett Maths
Perpendicular from a Line to a Point
Take steps in the right direction. With a short demonstration, a video shows the steps to construct a perpendicular from a line to a point. Using a protractor, the narrator confirms the resulting construction is perpendicular, and then...
Flipped Math
Proving Lines Parallel
Show it can all be proved. Scholars learn the converses of the properties of parallel lines. Using the converses, pupils determine which lines are parallel based on angle measurements and practice using a flow proof to show that two...
Corbett Maths
Perpendicular Bisector
Where should the statue be located? The resource explains how to use a compass and straight-edge to construct the perpendicular bisector of a line segment. Using an exam question, the narrator models how to solve an application problem...
Curated OER
Circles: Radius, Diameter and Circumference
Fascinating discussion regarding the origin of Pi accompanies a detailed explanation of how to find the circumference of a circle. Since this is the first installment in a series on circles, the concept of circumference is separated into...
Khan Academy
Khan Academy: Geometric Constructions: Circle Tangent
Sal constructs a line tangent to a circle using compass and straightedge.
Khan Academy
Khan Academy: Geometric Constructions: Circle Tangent (Example 2)
Sal constructs a line tangent to a circle using compass and straightedge.
Khan Academy
Khan Academy: Geometry: Ca Geometry: Pythagorean Theorem, Compass Constructions
This video tutorial demonstrates solutions to problems #51-55 of the California Geometry released state test questions. Problems address proving and using the Pythagorean theorem and compass constructions. [12:35]
Khan Academy
Khan Academy: Geometry: Ca Geometry: Compass Construction
Demonstrates solutions to problems #56-60 of the California Geometry released state test questions. Problems address compass constructions, slope of perpendicular lines, and using the distance formula. [12:49]