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Order of rotational symmetry of a semi-circle is two.
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In oblique sketch of the solid, the measurements are kept proportional.
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The order of rotational symmetry of a figure is 4 and the angle of rotation is 180° only.
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After rotating a figure by 120° about its centre, the figure coincides with its original position. This will happen again if the figure is rotated at an angle of 240°.
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Rotation turns an object about a fixed point which is known as centre of rotation.
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Draw an isosceles triangle with each of equal sides of length 3 cm and the angle between them as 45°.
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Tell whether the figure has rotational symmetry or not.
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Tell whether the figure has rotational symmetry or not.
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Tell whether the figure has rotational symmetry or not.
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Tell whether the figure has rotational symmetry or not.
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Tell whether the figure has rotational symmetry or not.
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Tell whether the figure has rotational symmetry or not.
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Tell whether the figure has rotational symmetry. Write yes or no.
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Tell whether the figure has rotational symmetry. Write yes or no.
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Tell whether the figure has rotational symmetry. Write yes or no.
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Tell whether the figure has rotational symmetry. Write yes or no.
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Does the figure have rotational symmetry?
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An atom consists of charged particles called electrons and protons. Each proton has a charge of +1 and each electron has a charge of –1. Remember number of electrons is equal to number of protons, while answering these questions:
What will be the charge on an atom if it loses an electron?
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An atom consists of charged particles called electrons and protons. Each proton has a charge of +1 and each electron has a charge of –1. Remember number of electrons is equal to number of protons, while answering these questions:
What will be the charge on an atom if it gains an electron?
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Remembering that 1AD came immediately after 1BC, while solving these problems take 1BC as –1 and 1AD as +1.
Bhaskaracharya was born in the year 1114 AD and died in the year 1185 AD. What was his age when he died?
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