This video explains the concepts of perimeter and area in 2D shapes. The instructor clearly explains the difference between the two and provides examples of how to calculate them in different shapes, including rectangles and triangles....

👉 Learn how to find the volume and the surface area of a pyramid. A pyramid is a 3-dimensional object having a polygon as its base and triangular surfaces converging at a single point called its apex. A pyramid derives its name from the...

This video is an introduction to trigonometry functions, which are used to calculate side lengths and angles in triangles using three important ratios: sine, cosine, and tangent. The video explains how to establish a right-angle triangle...

Defining the law of cosines.

The lecture video is about understanding and calculating perimeters of 2D shapes. The video covers basic shapes like rectangles and regular pentagons, as well as compound shapes made up of multiple shapes. The presenter shows how to...

👉 Learn how to factor a number, variable, and monomial completely. To factor means to write our term as a product of its factors. Therefore we will learn how to break down a number, variable, and monomial into its factors.

In this video, the teacher explains how to find the area of a rectangle or square by breaking it down into smaller rectangles. They demonstrate this concept using two example problems and emphasize the importance of multiplying the...

👉 Learn how to find a missing angle of a right triangle. A right triangle is a triangle that has 90 degrees as one of its angles. The trigonometric identities of right triangles gives us the relationship between the angles of a right...

In this short math video we will answer a standardized math test question where we are asked to identify how many unique triangles can be formed given side lengths. We will first draw a picture to represent the triangle and label the...

This video is an educational tutorial on triangles. The instructor begins by explaining how to classify triangles based on their angles, including acute, obtuse, and right angle triangles. Next, the video covers the three special types...

In this video, the teacher explains how to use the triangle inequality theorem to determine if three side measurements can form a triangle. They also teach how to use the converse of the Pythagorean theorem to determine if a triangle is...

How to calculate perimeter.

👉 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...

In this video, students learn how to efficiently find the ratios of side lengths for similar triangles, even when their sizes are different. They will understand the concept of similarity in triangles and how corresponding angles have an...

This video is an introduction to the topic of polygons. The presenter explains the differences between regular and irregular polygons, as well as convex and concave polygons. They also provide examples of each type of polygon and explain...

This video is a lecture presentation on quadrilaterals. The speaker explains what a quadrilateral is and goes through several different types, including a square, rectangle, trapezium, isosceles trapezium, rhombus, parallelogram, and...

👉 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...

In this video, the teacher explains how to find the length of the hypotenuse of a right triangle using the Pythagorean theorem. They provide examples and walk through the steps to calculate the length of a ladder and the diagonal of a TV...

This video explains how to determine the scale factor of a dilation by comparing the side lengths of the preimage and image. It demonstrates two methods: dividing the corresponding vertices and finding the ratio of the corresponding...

Understand and making sense of geometry: Proofs. This is part 2 from the series 'Geometry Program'.