The section it appears in covers only the Pythagorean theorem, the distance formula, and the midpoint formula. Quadrilaterals Formulas. Byju answer are very nice i like this app so much He has been teaching from the past 9 years. A square has four sides of equal length. Rectangle. Now let's go the other way. Teachoo provides the best content available! A quadrilateral has: • Quadrilateral has four sides. In British English a trapezoid is used to indicate a quadrilateral with no pairs of opposite sides parallel while in American English a trapezoid is a quadrilateral with one pair of opposite sides parallel. So it is definitely a quadrilateral. Solution: Given, diagonal 1 = 15 metre and diagonal 2 = 6 metre. – Sides of a square are of the same length (all sides are congruent). Subscribe to our Youtube Channel - https://you.tube/teachoo, Ex 10.2,13 Click hereto get an answer to your question ️ If two opposite sides of a cyclic quadrilateral are equal, then prove that the other two sides are parallel. – Opposite sides of a rectangle and square are parallel. What is Quadrilateral? A Quadrilateral has four-sides, it is 2-dimensional (a flat shape), closed (the lines join up), and has straight sides. Syllabus. In the above illustration, (a * c) + (b * d) = (D1 * D2) Proof: Also opposite sides are parallel. A rectangle is a quadrilateral whose interior angles are all 90°. Rhombus: All the sides are equal and diagonals bisect at 90 degrees. The sides that are not parallel to each other are called legs. Opposite sides subtend supplementary angles at centre Both bases are parallel. A quadrilateral is a closed figure that has four sides in it. Area of the quadrilateral is the total space occupied by the figure. You can easily imagine that if you extended sides and , they would intersect above the figure.. A trapezoid, in which the non-parallel sides are equal in length, is called isosceles. Thank you so much this helped me in my exam . 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