Shapes

Let us learn 2-D and 3-D Shapes

Learning of Space

A polygon, a name derived from Greek meaning many-angled, is a plane geometric figure bounded by three or more sides. Common examples of polygons are triangle, quadrilateral, pentagon and hexagon. All polygons have vertices, which are the angle points where two sides meet. Thus, the number of sides indicates the same number of vertices of a polygon. For example, a four-sided quadrilateral would have four vertices. Similarly, a n-sided polygon would have n vertices.  

Two-dimensional figure is enclosed by straight lines or curves. Various types geometrical shape such as square, rectangle, equilateral triangle, and circle. A triangle has three sides. A quadrilateral has four sides. Figures with round shapes are called circles, and have curved side. A square has four sides equal in length.

Three-dimensional geometric figures such as cube, cuboids, pyramid, sphere, cylinder and cone. Four sides of a cube are equal. Length, width and height of cuboids are different. Cone has a base of a circle. Pyramid has a square base. Pyramid with base of a rectangle. Cylinder has a circled base. Sphere with shape of a ball.

Three-Dimensional Geometric Forms

3D Shapes

Cuboid

Cube

Prism

Cylinder

Cone

Pyramid

Sphere

Two-Dimensional Geometric Figures

Having fun with 2D Shapes

2D Shapes

2D shapes

Circle

Triangle

Oval

Rectangle

Square

Matching Shapes With Krog

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Two Dimensional Geometric Forms

These geometric figures have only two dimensional plane surfaces – length and breadth. A plane surface means that the line joining any two points in the plane lies wholly in the plane.

Measurement of Length, Weight & Volume of Liquid

Conversion of volume of liquid involving litres and millilitres

1000 ml = 1 litre

2 litres = 2 x 1 litre

            = 2 x 1000 ml

            = 2000 ml

2340 ml = 2340 ÷ 1000 l

                 = 2.340 l

Reading scale of Cylinder

Volume of Liquid

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Volume of Liquid

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To ascertain and read the standard unit of millilitre and write its symbol ml

(1)               The amount of water in the bigger cylinder is 10 times as in the smaller cylinder.

(2)               The smaller cylinder can fill with liquid up to 1000 millilitres.

(3)               Millilitres is a smaller unit for measurement of the amount of liquid.

(4)               The symbol for milliliters is ml

(5)               1 l is equal to 1000 ml

Liquid Measure

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Volume of Liquid

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Measure Match (kg)

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Measurement of Weight

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kg to kg and g to g

1 kg = 1000 g

To change kg to g, multiply 1000

3.46 kg to g

3.46 kg = 3.46 x 1000 g = 3460 g

To change g to kg, divide 1000

2768 g to kg and g

2768 g = 2000 g + 768 g

                        = 2000 g ÷ 1000 kg + 768 g

                        = 2 kg 768 g

Measurement of Weight

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Reading Scale

Measurement of Weight

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Changes units of cm and mm

6 cm = 6 x 10 mm = 60 mm

5.4 cm = 5.4 x 10mm = 54 mm

In order to change the unit of cm to mm, we need to multiply the number of cm by 10.

87 mm = 87 ÷ 10 cm = 8.7 cm

24 mm = 24 ÷ 10 cm = 2.4 cm

In order to change the unit of mm to cm, we need to divide the number of mm by 10.

Measurement of length using millimetre (mm) and centimetre (cm)

cm = centimeter

mm = millimeter

1 cm = 10 mm

Measurement of Length

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