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Geometry - 5th grade

Name: Geometry - 5th grade
Genre: الرياضيات
Released: 2024-09-11
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الرياضيات

We review what an angle is: it consists of a vertex and two rays which are the sides of the angle. I show how to measure angles, and go through some basic terms (right angle, straight angle, acute angle, obtuse angle, reflex angle). Lastly, we draw a triangle with two given angles. Math Mammoth Grade 5 curriculum: Estimate angles - online practice

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Volume (how much space something takes) is measured in CUBIC units - which are simply little cubes. If the edges those cubes are 1 inch each, we have one cubic inch. If they are 1 cm each, we have a one cubic centimeter, and so on. Then we look at the volume of a rectangular prism (box in common language). I show using actual blocks that we can find the total volume by first figuring out how many blocks are in the bottom row, and then multiplying that by the height, or how many layers of blocks there are. This then leads us to the familiar formula for the volume of a rectangular prism: simply multiply the three dimensions (width, depth, height, or could also be called length, width, height).

user1408244541258Oct 22, 2025

Asmi BhandariOct 22, 2025

I go through and solve two geometry problems here. The first one involves finding the area of a frame. I show two methods for that. The second asks us to find both the area and the perimeter of a rectangular shape (polygon), when some of the side lengths are not known. We also need to divide the shape into several rectangles to find its area. Both problems are good and somewhat challenging for 5th-6th grade level - great for practicing problem solving.

Siwat ChotchaicharinOct 22, 2025

Roro_Ał219💕Oct 22, 2025

We classify a bunch of triangles as either acute, right, or obtuse (classification by angles), and as either scalene, isosceles, or equilateral (classification by sides). Then we tackle two drawing problems that concern triangles. Drawing is at the heart of what geometry is all about and it is both a hands-on activity, which students like, and also requires geometric reasoning about the attributes. This lesson is meant for 5th grade and onward. Check out also my free books and worksheets at

एलिशा रुम्बा तामाङOct 22, 2025

Jolie MariaOct 22, 2025

Do you know the seven types of quadrilaterals? We look at the quadrilaterals "family tree", first with only four types of quadrilaterals (to keep it simple), and then we add the rest. The completed family includes the kite, the trapezoid, the parallelogram, the rhombus, the rectangle, and the square. A scalene quadrilateral would form its own branch, so is not included. The family tree helps us to solve questions such as if a parallelogram is also a kite, or if a rectangle is trapezoid. This family tree uses this definition for a trapezoid: a trapezoid is a quadrilateral with AT LEAST one pair of parallel sides. That way, it can have "children" in the family tree - the parallelogram, the rhombus, the rectangle, and the square, which all also have at least one pair of parallel sides (in reality 2, but they fit the definition). This geometry lesson is intended for 5th grade level and onward. Check out also my free books and worksheets at

limakatso1988Oct 22, 2025

A.K.M ✪Oct 22, 2025

In this lesson, we go through definitions of the various quadrilaterals and how we mark congruent sides and parallel sides in drawings. Then, we solve two problems. The latter asks you to draw a parallelogram with 5 cm and 8 cm sides. Can you draw several different kinds? The first part of this lesson is here: Math Mammoth Grade 5 curriculum

mo_abdelrahmanOct 22, 2025

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