Geometry - English Vocabulary | Math | Maths & Geometry Vocabulary | Maths Part 2

Summary

In this video, Learn English with Tankmation introduces key geometry vocabulary, explaining the names and properties of common 2D and 3D shapes. From squares and triangles to circles and cylinders, the video covers essential terms such as sides, diagonals, vertices, perimeter, and area, as well as specific details for each shape like height, base, and angle types. Additionally, viewers learn about 3D shapes and their dimensions like volume, edges, and faces. The video ends with an interactive quiz to test understanding. This lesson is perfect for English learners looking to expand their geometry vocabulary.

Takeaways

• 😀 Learn English vocabulary related to geometry, including the names of shapes, lines, and angles.
• 😀 A square has equal sides, and its diagonal connects opposite corners. The perimeter is the sum of all sides, and the area is the square of a side.
• 😀 A rectangle has a length and width, with opposite sides parallel. It also has a diagonal, perimeter, and area.
• 😀 A triangle's base is the side it sits on, and the apex is the tip. The height is a line that runs from the apex to the base and must meet at a right angle.
• 😀 Four types of triangles: equilateral (all sides equal), isosceles (two sides equal), scalene (no sides equal), and right-angled (one right angle).
• 😀 In right-angled triangles, the hypotenuse is opposite the right angle, the adjacent side is at the base, and the opposite side is the third side.
• 😀 There are six types of angles: right angle (90°), acute angle (less than 90°), obtuse angle (greater than 90° but less than 180°), straight angle (180°), reflex angle (greater than 180° but less than 360°), and full rotation (360°).
• 😀 A circle's radius is the distance from the center to the edge, the diameter runs through the center, and a chord is a line from one edge to another without passing through the center.
• 😀 The perimeter of a circle is called the circumference, while the area is still calculated as it is for other shapes.
• 😀 Three-dimensional shapes, such as spheres, cubes, cuboids, pyramids, cones, and cylinders, are defined by volume and include length, width, height, and sometimes depth.

Q & A

What is the definition of a square in geometry?

A square is a two-dimensional shape where all sides are equal in length. The line running from one corner of the square to the other is called the diagonal.

What does the term 'perimeter' refer to?

Perimeter refers to the total length of all the sides of a shape. For a square or rectangle, it is the sum of the lengths of all four sides.

What is the difference between a rectangle and a square?

The main difference is that in a rectangle, the sides are of two different lengths (length and width), whereas in a square, all sides are equal.

What is meant by the term 'height' in a triangle?

The height of a triangle is the perpendicular line drawn from the apex (the top point) to the base of the triangle. It must form a right angle with the base.

What are the four types of triangles?

The four types of triangles are: equilateral (all sides and angles are equal), isosceles (two sides and angles are equal), scalene (no equal sides or angles), and right-angled (one angle is exactly 90 degrees).

What does the term 'hypotenuse' refer to in a right triangle?

The hypotenuse is the side opposite the right angle in a right triangle. It is the longest side.

What are the six types of angles in geometry?

The six types of angles are: right angle (90 degrees), acute angle (less than 90 degrees), obtuse angle (greater than 90 but less than 180 degrees), straight angle (180 degrees), reflex angle (greater than 180 but less than 360 degrees), and full rotation (360 degrees).

What is the difference between a 'diameter' and a 'radius' in a circle?

The radius is the line that runs from the center of the circle to its edge, while the diameter is the line that passes through the center and connects two points on the circle's edge.

What is the correct term for the perimeter of a circle?

The perimeter of a circle is called the circumference.

What is the focus when measuring three-dimensional shapes?

For three-dimensional shapes, the focus is on measuring the volume, which refers to the amount of space an object occupies, typically measured in cubic units.