Curated Video
Making a Straight Line with Right Triangles
In this video, the teacher explains why only some right triangle hypotenuses combine to make a straight line. They demonstrate that when the ratios of the sides of two right triangles are equal, they can be placed together to form a...
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
Apply the Area of Squares Proof to determine if a triangle is a right triangle
In this lesson you will learn how to determine if a triangle is a right triangle by applying the Area of Squares Proof.
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.
Brian McLogan
Given a point find the six trigonometric functions of the angle
In this video series I show you how to evaluate the six trigonometric functions when given a point. We do this by creating a right triangle and finding the hypotenuse by using the Pythagorean theorem. #trigonometry...
Brian McLogan
Evaluating the difference of two angles for the cosine function
👉 Learn how to evaluate the secant of the sum or difference of two angles using the sum/difference formulas. To do this, we first use the Pythagoras theorem to obtain all the sides of the right triangle in the unit circle. Recall that...
Curated Video
Understand the Relationship Between Exterior Angles
This video lesson explains the concept of exterior angles in triangles and how they are related to the interior angles. It demonstrates how to find the measures of exterior angles using the sum of interior angles. It also applies this...
Product Design Online
Learn Fusion 360 in 30 Days - Day #18: Turning an .STL (Mesh) File into a Solid
Note: The Mesh tools are out of preview and no longer have to be turned on in your Preferences. Mesh Workspace is now a Mesh Tab in Design Workspace Fusion 360's Mesh tools are now located within the Design Workspace. Right-click on the...
Brian McLogan
Tutorial for evaluating the six trig functions given a coordinate point
👉 Learn all about evaluating trigonometric functions with triangles. In this playlist, we will learn how to evaluate, sine, cosine, tangent, cotangent, secant, and cosecant when given the sides of a triangle. If we have missing sides we...
Brian McLogan
How do we find the surface area of a triangular prism
👉 Learn how to find the volume and the surface area of a prism. A prism is a 3-dimensional object having congruent polygons as its bases and the bases are joined by a set of parallelograms. A prism derives its name from the shape of its...
Curated Video
Applying Angles of Elevation and Depression
In this video lesson, students learn how to use right triangles and angles of elevation and depression to find the height of a space shuttle on a launch pad. The lesson explains the concept of mathematical modeling and guides students...
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...
Curated Video
Describing Cross-Sections of a Right Rectangular Pyramid
In this video, students learn how to describe the cross-sections of a right rectangular pyramid by slicing at different angles. They are introduced to the concept of cross-sections and how they result from cutting a 3-dimensional shape...
Brian McLogan
Geometry - How to Write a Proof of Congruent Triangles Using AAS
👉 Learn how to prove that two triangles are congruent. Two or more triangles are said to be congruent if they have the same shape and size. There are many postulates and theorems to determine whether two triangles are congruent. They...
Curated Video
Finding Rules and the 9th Step in Geometric Triangle Patterns Using a Table
In this video, students learn how to find the rules and the 9th step in a geometric triangle growth pattern using a table. The teacher explains the concept of steps and rules in patterns, and demonstrates how to identify the number of...
Curated Video
Drawing a Hexagon
In this video, the teacher explains how to draw a hexagon by connecting six straight sides. The lesson emphasizes the importance of following three rules: drawing six sides, ensuring the sides are straight, and making sure all sides meet...
Curated Video
GCSE Secondary Maths Age 13-17 - Geometry & Measures: Parallel Lines - Explained
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 steps. This video...
Brian McLogan
Evaluating the composition of Functions using Right Triangles
👉 Learn how to evaluate an expression with the composition of a function and a function inverse. Just like every other mathematical operation, when given a composition of a trigonometric function and an inverse trigonometric function,...
Curated Video
Proving the Pythagorean Theorem Using Similarity
In this lesson, students will learn how to prove the Pythagorean theorem using similarity. By investigating and following a series of steps, they will discover that by cutting a right triangle and drawing altitudes, they can create...
FuseSchool
Exterior Angles Of Polygons
In this video we are going to look at exterior angles of polygons. Exterior angles are a little strange. They make a straight line with the interior angle, rather than being the whole outside angle. There are a few different ways to...
Brian McLogan
How to quickly write out the unit circle
👉 Learn about the unit circle. A unit circle is a circle which radius is 1 and is centered at the origin in the cartesian coordinate system. To construct the unit circle we take note of the points where the unit circle intersects the x-...
Brian McLogan
How to use the pythagorean theorem to find the missing length of a kite
👉 Learn how to solve problems with kites. A kite is a four-sided shape (quadrilateral) with two equal pairs of adjacent sides and the diagonals are perpendicular. Some of the properties of kites are: each pair of adjacent sides are...
Let's Tute
Introduction to Tangents of a Circle
In this video, the teacher explains the concept of tangents in a circle. They discuss the origin of the term, the point of contact, the number of tangents a circle can have, and various properties of tangents including their relationship...