Instructional Video4:30
Curated Video

Identify Properties of Right Triangles

K - 5th
This video describes the unique properties of right triangles. It explains that every right triangle has one right angle, two legs, and one hypotenuse. It also emphasizes that the size and orientation of right triangles can vary, but...
Instructional Video3:21
Brian McLogan

How do you find all of the sides for a equilateral triangle

12th - Higher Ed
👉 Learn how to find the missing side of a triangle. A triangle is a polygon with three sides. Triangles are classified on the basis of the angles or on the basis of the sides. The classification of a triangle on the basis of the sides...
Instructional Video2:38
Brian McLogan

What is similarity

12th - Higher Ed
👉 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...
Instructional Video3:31
Brian McLogan

Using two 30 60 90 triangles to determine the missing lengths of a figure

12th - Higher Ed
👉 Learn about the special right triangles. A special right triangle is a right triangle having angles of 30, 60, 90, or 45, 45, 90. Knowledge of the ratio of the length of sides of a special right triangle enables us to solve for any...
Instructional Video3:39
Brian McLogan

What is the SAS Congruence Theorem for Triangles - Congruent Triangles

12th - Higher Ed
👉 Learn about congruent triangles theorems. Two or more triangles (or polygons) are said to be congruent if they have the same shape and size. There are many methods to determine whether two triangles are congruent. Some of the methods...
Instructional Video5:35
Brian McLogan

How to apply the sum of angles with the sine of an angle not on unit circle

12th - Higher Ed
👉 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...
Instructional Video6:16
Let's Tute

Midpoint Theorem

9th - Higher Ed
In this session we will learn the Midpoint Theorem with the help of 3 steps
Instructional Video3:00
Brian McLogan

What is the SSS Congruence Theorem for Triangles - Congruent Triangles

12th - Higher Ed
👉 Learn about congruent triangles theorems. Two or more triangles (or polygons) are said to be congruent if they have the same shape and size. There are many methods to determine whether two triangles are congruent. Some of the methods...
Instructional Video3:52
Brian McLogan

What is the HL Theorem - Congruent Triangles

12th - Higher Ed
👉 Learn about congruent triangles theorems. Two or more triangles are said to be congruent if they have the same shape and size. There are many methods to determine whether two triangles are congruent. Some of the methods include: (1)...
Instructional Video3:26
Brian McLogan

What are Congruent Parts of Two Triangles

12th - Higher Ed
👉 Learn how to find the corresponding pairs of congruent triangles. Two or more triangles are said to be congruent if they have the same shape and size. To determine the corresponding congruent parts of a triangle, we use the congruent...
Instructional Video4:39
Brian McLogan

Proving Two Sides are Equal Using CPCTC - Congruent Triangles

12th - Higher Ed
👉 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...
Instructional Video2:45
Brian McLogan

CCSS What is an angle bisector

12th - Higher Ed
👉 Learn how to define angle relationships. Knowledge of the relationships between angles can help in determining the value of a given angle. The various angle relationships include: vertical angles, adjacent angles, complementary angles,...
Instructional Video3:22
KnowMo

Trigonometry: Finding Missing Sides and Angles with the "SohCahToa" Trick

12th - Higher Ed
This video teaches the basics of trigonometry and how to use it to find missing lengths and angles in a triangle. The presenter explains the three trig functions (sine, cosine, and tangent) and offers memory aids to remember them. The...
Instructional Video5:06
Curated Video

Finding Missing Sides in Triangles with Parallel Lines

K - 5th
In this video, the teacher explains how to find a missing side of a triangle when it is split by a parallel line. They demonstrate the concept by drawing parallel lines and a transversal, creating corresponding angles.
Instructional Video2:12
Brian McLogan

What is the formula for the area of a triangle

12th - Higher Ed
👉 Learn how to find the area and perimeter of triangles. A triangle is a shape of three sides. The area of a shape is the measure of the portion enclosed by the shape while the perimeter of a shape is the measure of the outline enclosing...
Instructional Video3:39
TMW Media

Area Of Trapezoids: The formula to calculate the area of a trapezoid

K - 5th
What is the area of triangle 1 and 2 of the trapezoid? What is the difference between the area of the two triangles? Area Of Trapezoids, Part 2
Instructional Video8:48
Curated Video

Proving the Triangle Midsegment Theorem using Triangle Similarity

K - 5th
In this video, we learn how to find the length of the midsegment of a triangle by using properties of triangle similarity. The video provides a step-by-step explanation and proof of the triangle midsegment theorem.
Instructional Video8:01
Brian McLogan

Writing a proof for equiangular angles within each other

12th - Higher Ed
👉 Learn how to write a proof given a triangle. A triangle is a polygon with three sides. A proof is a series of statements and reasons that establishes the truth of a mathematical claim(statement). To write a proof given a triangle, we...
Instructional Video1:58
Brian McLogan

Finding the measure for each side of an isosceles triangle

12th - Higher Ed
👉 Learn how to find the missing side of a triangle. A triangle is a polygon with three sides. Triangles are classified on the basis of the angles or on the basis of the sides. The classification of a triangle on the basis of the sides...
Instructional Video7:37
Brian McLogan

Writing a Proof to Prove Congruent Triangles Using AAS - Congruent Triangles

12th - Higher Ed
👉 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...
Instructional Video4:59
Brian McLogan

How to Write a Proof for Two Triangles Congruent Under ASA

12th - Higher Ed
👉 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...
Instructional Video4:24
Brian McLogan

Determine Corresponding Parts as Well as an Concurrency Statement - Congruent Triangles

12th - Higher Ed
👉 Learn how to find the corresponding pairs of congruent triangles. Two or more triangles are said to be congruent if they have the same shape and size. To determine the corresponding congruent parts of a triangle, we use the congruent...
Instructional Video5:54
Brian McLogan

Determine 1, 2, or no triangles law of sines

12th - Higher Ed
👉 Learn how to determine if a given SSA triangle has 1, 2 or no possible triangles. Given two adjacent side lengths and an angle opposite one of them (SSA or ASS), then there are 3 possible cases: there can be 1 solution, 2 solutions,...
Instructional Video5:32
Brian McLogan

Area of Inscribed Equilateral Triangle of Circle | Can You Solve?

12th - Higher Ed
Area of Inscribed Equilateral Triangle of Circle | Can You Solve?