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Basic Geometrical Ideas 45
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Full exercise on Basic Geometrical Ideas, fully solved. This is a video tutorial for 6th class NCERT students. For other educational stuff, subscribe and press bell icon. • Geometry has a long and rich history. The term ‘Geometry’ is the English equivalent of the Greek word ‘Geometron’. ‘Geo’ means Earth and ‘metron’ means Measurement. • A four sided polygon is a quadrilateral. It has 4 sides and 4 angles. As in the case of a triangle, you can visualise its interior too. In any quadrilateral ABCD, AB and BC are adjacent sides. AB and DC are opposite sides. ∠A and ∠C are said to be opposite angles; similarly, ∠D and ∠B are opposite angles. Naturally ∠A and ∠B are adjacent angles. • 1. Draw a rough sketch of a quadrilateral PQRS. Draw its diagonals. Name them. Is the meeting point of the diagonals in the interior or exterior of the quadrilateral? • 2. Draw a rough sketch of a quadrilateral KLMN. State, • (a) two pairs of opposite sides, • (b) two pairs of opposite angles, • (c) two pairs of adjacent sides, • (d) two pairs of adjacent angles. • 3. Investigate : • Use strips and fasteners to make a triangle and a quadrilateral. Try to push inward at any one vertex of the triangle. Do the same to the quadrilateral. Is the triangle distorted? Is the quadrilateral distorted? Is the triangle rigid? Why is it that structures like electric towers make use of triangular shapes and not quadrilaterals? • #BasicGeometricalIdeas #NcertSolutions #solvedexercises #teaching #ncert #cbse #maths #MathematicsClassVI #schoolmadeeasy #samrules • If you have any videos related questions, please get in touch via comments. • Make sure to Subscribe and get the latest tutorials for your delight :) • http://www.youtube.com/subscription_c... • Make sure to check out our other Video Tutorials! • Also, check us out when we're posting other helpful videos all throughout the week to help you tell more and grow more using online video.
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