👉 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...

It explains the angle sum property of a triangle, that is, the sum of the measures of all angles of a triangle is 180 degrees.

In this video lesson, students learn about the properties of triangle angles. They discover that the sum of the three angles in a triangle always adds up to 180 degrees, regardless of the type of angles involved. The lesson also...

👉 Learn how to solve with the ratio of sides and angles of a triangle. Given the ratio of the sides of a triangle and the perimeter of the triangle, we can solve for the actual lengths of the triangle. Similarly, when the ratio of the...

👉 Learn about the interior and the exterior angles of a polygon. A polygon is a plane shape bounded by a finite chain of straight lines. The interior angle of a polygon is the angle between two sides of the polygon. The sum of the...

In this math video we will determine how many unique triangles can be formed from a proposed list of angle measures. We will begin by reviewing the Triangle Angle Theorem which states that the three interior angles of a triangle must...

New ReviewIn this Grade 7 math video, we solve a problem aligned with Standard 7.G.A.2 — determining which sets of angles or sides CANNOT form a triangle!
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We review two key
theorems:
🔹 Triangle Sum Theorem — The sum of the...

This video covers All About 'Lines & Angles' Such as - Introduction to Lines & Angles - Types of Angles - Theorems

New ReviewIn this short math video will find the measure of an angle of a triangle inscribed in a circle. We will review that if a triangle is inscribed in a circle and one side of the triangle is the diameter of the circle, then the angle...

Pupil outcome: I can use the fact that the interior angles of any triangle sum to 180° to find the size of missing angles. Key learning points: - Missing angles in triangles can be found using the angle sum. - Missing angles in triangles...

In this video we are going to look at the angles in polygons… the sum of all interior angles and the size of one interior angle. In another video we will look at exterior angles.



Before we start, you should...

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...

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...

Pupil outcome: I can demonstrate and prove that in a triangle, the sum of the interior angles is 180°. Key learning points: - By considering a number of different triangles you can demonstrate facts about the angles in triangles. - The...

In this lesson, students will learn how to find the measure of an angle in a triangle by using the other two angles. They will understand that the sum of the angles in a triangle is always 180 degrees.

In this video, students learn how to draw triangles when given the angles. The teacher explains the concept of the sum of angles in a triangle always being 180 degrees and demonstrates how to use a protractor to draw the angles accurately.

Lets write. a proof to show once and for all that the sum of all angles in a triangle is going to be 180 degrees. To do this I will use a two column proof.

In this short video we will answer a standardized math test question where we are asked to identify a missing angle of a triangle. We will review the definition and meaning of similar triangles. We will identify which angle corresponds...

👉 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,...

👉 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,...

Triangles can also be classified based on their angles. An acute triangle has all three angles less than 90 degrees, a right triangle has one angle exactly 90 degrees, and an obtuse triangle has one angle greater than 90 degrees. No...

👉 Learn how to solve for an unknown variable in the interior angle of a polygon. A polygon is a plane shape bounded by a finite chain of straight lines. The interior angle of a polygon is the angle between two sides of the polygon. The...

👉 Learn how to determine the number of sides of a regular polygon. A polygon is a plane shape bounded by a finite chain of straight lines. A regular polygon is a polygon whose sides are congruent (equal). The interior angle of a polygon...

In this video, students are guided through a hands-on activity to prove why the angles of a triangle always add up to 180 degrees. By drawing and cutting out a triangle, labeling the angles, and connecting them together, students can...