# Quadrilateral

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A 2-dimensional four sided polygon is called as a Quadrilateral. Different types of Quadrilateral are
 Opposite sides are parallel and equal. Area = base x height Two pairs of adjacent sides are equal. AB = BC and AD = CD Diagonals intersect at right angles. Area = (AC x BD)⁄2 Opposite sides are parallel and equal. Each angle in a rectangle is 90°. Area = Length x width All the four sides are equal. Diagonals are perpendicular. Area = (PQ × RS)⁄2 A pair of sides is parallel. Area = (a+b)h⁄2 Here a, b are length of parallel sides And h is the height. All the sides are equal. Diagonals bisect each other. Each angle in a square is equal to 90° Area = side²
1) A parallelogram with all sides equal and angles as right angles is a
(a) Rectangle          (b) Square          (c) Rhombus          (d) Kite
Answer: b
2) Select a regular quadrilateral from the following
(a) Rectangle          (b) Parallelogram         (c) Square          (d) Rhombus
3) Statement I: A square is also a rectangle.
Statement II: A rectangle is also a square.
(a) Both I & II are true          (b) I is true, II is false
(c) I is false, II is true          (d) Both I & II are false
Answer: b
4) Sum of interior angles in a quadrilateral is
(a)180°         (b) 360°         (c) 90°          (d) can't be determined