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Perimeter

If any two op...

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If any two opposite angles of a quadrilateral measure 90° will it always be a rectangle?

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Q. To call any given quadrilateral a rectangle, the opposite sides of the quadrilateral must be equal, and all angles should be equal to 90°.

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Q. Complete each of the following statements by means of one of those given in brackets against each:
(i) If one pair of opposite sides are equal and parallel, then the figure is ........................
(parallelogram, rectangle, trapezium)

(ii) If in a quadrilateral only one pair of opposite sides are parallel, the quadrilateral is ................ (square, rectangle, trapezium)

(iii) A line drawn from the mid-point of one side of a triangle .............. another side intersects the third side at its mid-point. (perpendicular to parallel to, to meet)

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(v) Consecutive angles of a parallelogram are ...................
(supplementary, complementary)

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(rectangle, parallelogram, rhombus)

(vii) If opposite angles of a quadrilateral are equal, then it is necessarily a ....................
(parallelogram, rhombus, rectangle)

(viii) If consecutive sides of a parallelogram are equal, then it is necessarily a ..................
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