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Geometry - 8th grade

Matematika

What is kind of amazing about similar triangles is that to show that two triangles are similar, it is sufficient to show that TWO (only two) of their angles are congruent. You don't need to check anything about the sides! And, in similar triangles (as in all similar figures), the corresponding sides are in the same ratio (or proportional). Once we have explored this principle, we solve an exercise that asks whether two triangles are similar or not. The latter half of the video is spent solving another exercise where we need to use a proportion to find an unknown side length of a triangle. Math Mammoth Grade 8 Curriculum

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Matematika

Tahun

2025

Durasi

1h 5m

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Release2025

Runtime1h 5m

IMDb★ 0

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Komentar

10 Komentar

🧜🏻‍♂️OmarBenazzouz🧜🏻‍♂️Oct 22, 2025

First, we look at the definition of a prism and of a cylinder. The volume of both prisms and cylinders is calculated the same way: multiply the area of the base times the height. Next, we calculate the volume of a cylinder that looks like a pipe (it's not "standing up"). The final answer needs rounded according to the rules for significant digits. Then we do the same for a triangular prism. Math Mammoth Grade 8 curriculum

A.B IIOct 22, 2025

First, we look at the definition of a prism and of a cylinder. The volume of both prisms and cylinders is calculated the same way: multiply the area of the base times the height. Next, we calculate the volume of a cylinder that looks like a pipe (it's not "standing up"). The final answer needs rounded according to the rules for significant digits. Then we do the same for a triangular prism. Math Mammoth Grade 8 curriculum

safaeofficial1Oct 22, 2025

The volume of a sphere is 4/3 times Pi times radius cubed. We apply this formula in two word problems. The first one asks us to find how many tennis balls have a volume that exceeds one liter. The second one has to do with the volume of a pond that is 90% full of water, in shape of a half-sphere. Math Mammoth Grade 8 curriculum

mr__aatuOct 22, 2025

The volume of a sphere is 4/3 times Pi times radius cubed. We apply this formula in two word problems. The first one asks us to find how many tennis balls have a volume that exceeds one liter. The second one has to do with the volume of a pond that is 90% full of water, in shape of a half-sphere. Math Mammoth Grade 8 curriculum

penny.giftyOct 22, 2025

The formula for the volume of both pyramids and cones is V = (area of the base) x (height) / 3. We calculate the volume of a circular cone, keeping in mind that the diagram gives us the diameter, not the radius, but we need the radius for the area of the circle. Then in the second example, the task is to find the height of a square pyramid when its volume and the side of the base are known. Math Mammoth Grade 8 curriculum

SK - MUSIC / PRODUCTOct 22, 2025

The formula for the volume of both pyramids and cones is V = (area of the base) x (height) / 3. We calculate the volume of a circular cone, keeping in mind that the diagram gives us the diameter, not the radius, but we need the radius for the area of the circle. Then in the second example, the task is to find the height of a square pyramid when its volume and the side of the base are known. Math Mammoth Grade 8 curriculum

Julie BambaOct 22, 2025

In simple terms, two figures are similar figures if they have the same basic shape (but are not necessarily the same size). Mathematically speaking, two figures are similar if there is a sequence of transformations mapping one to the other (reflections, translations, rotations, and dilations are allowed). We also look at an exercise where a triangle is mapped to another, using a sequence of transformations, proving they are similar. Then in another exercise, we're given the coordinates of the vertices for two distinct transformations, and the task is to figure out what transformations they were. Math Mammoth Grade 8 curriculum Practice geometric transformations online

Kiki❦Oct 22, 2025

When two geometric figures are similar, they have the same basic shape but are not necessarily the same size. We multiply the side lengths of one by the scale factor to get the side lengths of the other. One can also use a scale ratio. I explain how to get the scale ratio from the scale factor. To calculate unknown side lengths, we can use the scale factor, or set up a proportion. Math Mammoth Grade 8 curriculum

lasisielenuOct 22, 2025

When two geometric figures are similar, they have the same basic shape but are not necessarily the same size. We multiply the side lengths of one by the scale factor to get the side lengths of the other. One can also use a scale ratio. I explain how to get the scale ratio from the scale factor. To calculate unknown side lengths, we can use the scale factor, or set up a proportion. Math Mammoth Grade 8 curriculum

TWICEOct 22, 2025

This video is intended for review in 8th grade, before embarking on the study of further angle relationships. In this lesson we review these basic angle relationships from 7th grade: concept of an angle, acute, right, obtuse, and reflex angles, adjacent angles, complementary angles, supplementary angles, and vertical angles. Then we have two exercises with unknown angles to solve. :) Math Mammoth Grade 8 curriculum