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  1. (c) to resist any change in its state of motion. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/

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  2. The order of rotational symmetry of an equilateral triangle is 3. This means that the triangle could be rotated 120° three times before matching its original position. Therefore, it has three symmetrical positions during rotation. Click here for more: https://www.tiwariacademy.com/ncert-solutions/clRead more

    The order of rotational symmetry of an equilateral triangle is 3. This means that the triangle could be rotated 120° three times before matching its original position. Therefore, it has three symmetrical positions during rotation.

    Click here for more:
    https://www.tiwariacademy.com/ncert-solutions/class-6/maths/

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  3. (b) maximum when breadth and width from the base. Pressure is maximum when area of base is minimum. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-9/

    (b) maximum when breadth and width from the base. Pressure is maximum when area of base is minimum.

    https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-9/

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  4. A circle has infinite lines of symmetry. Every diameter of a circle divides it into two equal halves and acts as a line of symmetry. Therefore a circle can be reflected across any line passing through its center. Click here for more: https://www.tiwariacademy.com/ncert-solutions/class-6/maths/

    A circle has infinite lines of symmetry. Every diameter of a circle divides it into two equal halves and acts as a line of symmetry. Therefore a circle can be reflected across any line passing through its center.

    Click here for more:
    https://www.tiwariacademy.com/ncert-solutions/class-6/maths/

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  5. The center of rotation in rotational symmetry is called the Centre of rotation. It is the fixed point around which a shape is rotated. All points on the shape move in circular paths around this center. Click here for more: https://www.tiwariacademy.com/ncert-solutions/class-6/maths/

    The center of rotation in rotational symmetry is called the Centre of rotation. It is the fixed point around which a shape is rotated. All points on the shape move in circular paths around this center.

    Click here for more:
    https://www.tiwariacademy.com/ncert-solutions/class-6/maths/

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