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(a) four sides of equal length

(b) four right angles

.

Answer :

(a) Rhombus and square.

(b) Rectangle and square.

- 1.State whether True or False. (a) All rectangles are squares. (b) All rhombuses are parallelograms. (c) All squares are rhombuses and also rectangles. (d) All squares are not parallelograms. (e) All kites are rhombuses. (f) All rhombuses are kites. (g) All parallelograms are trapeziums. (h) All squares are trapeziums.
- 3.Explain how a square is (i) a quadrilateral (ii) a parallelogram (iii) a rhombus (iv) a rectangle
- 4.Name the quadrilaterals whose diagonals (i) bisect each other (ii) are perpendicular bisectors of each other (iii) are equal
- 5.Explain why a rectangle is a convex quadrilateral.
- 6.ABC is a right-angled triangle and O is the midpoint of the side opposite to the right angle. Explain why O is equidistant from A, B and C. (The dotted lines are drawn additionally to help you).

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