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Direction: In the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
Assertion : A diameter of a circle is the longest chord of the circle and all diameters have equal length.
Reason : Length of a diameter = radius.
Direction: In the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
Assertion : The length of a chord which is at a distance of 5 cm from the centre of a circle of radius 10 cm is 17.32 cm.
Reason : The perpendicular from the centre of a circle to a chord bisects the chord.
Direction: In the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
Assertion : In an isosceles triangles ABC with AB = AC , a circle is passing through B and C intersects the sides AB and AC at D and E respectively. Then DE  BC
Reason : Exterior angle of a cyclic quadrilateral is equal to interior opposite angle of that quadrilateral
Direction: In the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
Assertion : The circumference of a circle must be a positive real number.
Reason : If r(>) 0 is the radius of the circle, then its circumference 2πr is a positive real number.
Direction: In the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
Assertion : The sum of either pair of opposite angles of a cyclic quadrilateral is 180º.
Reason : Two or more circles are called concentric circles if and only if they have different centre and radii.
Direction: In the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
Assertion : The measure of ∠AOC = 60º
Reason : Angle subtended by an arc of a circle at the centre of the circle is double the angle subtended by arc on the circumference.
Direction: In the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
Assertion : Two diameters of a circle intersect each other at right angles. Then the quadrilateral formed by joining their endpoints is a square.
Reason : Equal chords subtend equal angles at the centre.
Direction: In the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
Assertion : Given a circle of radius r and with centre O. A point P lies in a plane such that OP > r then point P lies on the exterior of the circle.
Reason : The region between an arc and the two radii, joining the centre of the end points of the arc, is called a sector.
Direction: In the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
Assertion : If A and B are any two points on a circle, then the line segment AB is called a chord of the circle.
Reason : Equal chords of a circle subtend equal angles at the centre.
Direction: In the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
Assertion : In a cyclic quadrilateral ABCD, ∠A  ∠C = 60º, then the smaller of two is 60º.
Reason : Opposite angles of cyclic quadrilateral are supplementary.
42 videos378 docs65 tests

42 videos378 docs65 tests
