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Parin Sir > definition

Aug

(1) Find the angle between the hour hand and the minute hand of a clock when the time is 3 : 30.

Soln. Hour hand covers a distance of 3 hrs. and 30 minutes = 210 minutes and Minute hand covers a distance of 30 minutes.

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Posted in: Examples 1 to 4 of Clocks,

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Aug

General Concepts

☼ GENERAL CONCEPTS :

↦ It is 11 : 00 o’clock. In how many minutes both the hands will coincide ?

Soln. Our wrong answer is 55 minutes. Because we always give answer by fixing ( no movem…

Posted in: General Concepts,

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Aug

Clocks

☼ INTRODUCTION : We know that the person who appreciate the time, the time will appreciate him. We have mainly two hands in a watch or clock. ( Actually we have three hands, but we ignore the seconds hand because …

Posted in: Clocks,

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Aug

Loci

☼ Locus : If a point moves according to some given geometrical conditions, then the path traced out by the moving point is called its Locus ( or Curve ).

■ The locus of a point equidistant from two given poin…

Posted in: Loci,

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Aug

Index of Circle

01. Introduction

02. Some Important Results

03. Arc of a circle and its length
…

Posted in: Index of Circle,

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Aug

Examples of Circle

1) Δ PQR is an equilateral triangle. Find QSR and QTR.

Soln. Δ PQR is equilateral. ∴ ∠QPR = 60⁰.

∴∠QSP = 60⁰

Posted in: Examples of Circle,

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Aug

Circle and its tangent

☼ Circle and its tangent :

↦ Three collinear points cannot lie on a circle.

↦ If a line in the plane of a circle has common point with the circle, then there are two alternatives :

The line intersects the circ…

Posted in: Circle and its tangent,

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Aug

Arc of a circle and its length

☼ Arc of a circle and its length :

Arc of a circle : If A and B are any two distinct points on a circle, then the set of all the points of the circle lying in any closed half-plane of

Posted in: Arc of a circle and its length,

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Aug

Some Important Results

☼ Some Important Results :

The perpendicular drawn through the centre of a circle on a chord bisects the chord.

Posted in: Some Important Results,

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Aug

Circle

☼ Circle : The set of all the points of a plane, at a given distance from a given point of the plane, is called a circle. The given point is called the centre of the circle and the given distance is called the radius of the circle….

Posted in: Circle,

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