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Say True or False: (a) Each angle of a rectangle is a right angle. (b) The opposite sides of a rectangle are equal in length. (c) The diagonals of a square are perpendicular to one another. (d) All the sides of a rhombus are of equal length (e) All the sides of a parallelogram are of equal length. (f) The opposite sides of a trapezium are parallel-Mathematics-cbse std 6th-Understanding elementary shapes.1 AnswerIn a triangle, if the square of one side is equal to the sum of the squares of the other two sides, then prove that the angle opposite the first side is a right angle. CBSE Mathematics1 AnswerIf two sides of one triangle are equal to two sides of another triangle and the contained angles are supplementary, show that the two sides are equal in area. CBSE class 9 Mathematics1 AnswerGive reasons for the following: (a) A square can be thought of as a special rectangle. (b) A rectangle can be thought of as a special parallelogram. (c) A square can be thought of as a special rhombus. (d) Squares, rectangles, parallelograms are all quadrilaterals (e) Square is also a parallelogram.-Mathematics-cbse std 6th-Understanding elementary shapes.1 Answer Find the height of a trapezium in which parallel sides are 25 cm 77 cm and non-parallel sides and 26 cm and 60 cm. Given the area of the trapezium as 1644 cm2. CBSE class 9 Mathematics1 AnswerA rectangle is formed by joining the mid-points of the sides of a rhombus. Show that the area of rectangle is half the area of rhombus. CBSE class 9 Mathematics1 AnswerA wire of length 340 mm is to be cut into two parts. One of the parts is to be made into a square and the other into a rectangle where sides are in the ratio of 1:2. What is the length of the side of the square (in mm) such that the combined area of 1 AnswerAB and CD are parallel sides of trapezium ABCD. Diagonals AC and BD intersect at O. prove that ar(ΔAOD) = ar(ΔBOC). CBSE class 9 Mathematics1 AnswerConstruct a triangle ABC with BC = 7 cm, angle B = 60 degree and Ab = 6 cm. Construct another triangle whose sides are 3/4 times the corresponding sides of triangle ABC. Mathematics CBSE class 10 20151 AnswerProve that the ratio of the areas of two similar triangles is equal to the square of the ratio of their corresponding sides. CBSE Mathematics1 AnswerIf all the sides of a parallelogram touch a circle, show that the parallelogram is a rhombus. CBSE Mathematics1 AnswerFind the area of an isoscles triangle with two equal sides as 5 cm each and the third side as 8 cm. CBSE class 9 Mathematics1 AnswerDraw two field lines around a bar magnet along its length on its two sides and mark the field directions on them by arrow marks. -2005 CBSE Physic class 101 AnswerConstruct a triangle ABC with side BC = 7 cm, ∠B = 45°, ∠A = 105°. Then construct another triangle whose sides are 3 / 4 times the corresponding sides of the triangle ABC. Mathematics CBSE class 10 20171 AnswerThe lengths of diagonals of a rhombus are 24 cm and 18 cm respectively. Find the length of each side of the rhombus. CBSE class 9 Mathematics1 AnswerWhy is it better to use a divider than a ruler, while measuring the length of a line segment?-Mathematics-cbse std 6th-Understanding elementary shapes.1 AnswerConstruct an isosceles triangle whose base is 6 cm and altitude 4 cm. Then construct triangle whose sides are 3/4 times the corresponding sides of the isosceles triangle. Mathematics CBSE class 10 20151 AnswerIn Triclinic crystal system, the three crystallographic axes a, b, c are of -gate Geology & Geophysics 20171 AnswerFill in the blanks with acute, obtuse, straight :-Mathematics-cbse std 6th-Understanding elementary shapes.1 AnswerFind the area of the triangle ABC with A(1,-4) and mid points of sides through A being (2,-1) and (0,-1). Mathematics CBSE class 10 20151 Answer