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  • 2015
  • April

Month: April 2015

Apr 29

Geometry Sum | ABCD is a square. Prove in each case ∆APD ≅ ∆BPC | Find Angle DPC Angle PCD and Angle PCD |

Urooz AliLeave a commentmc9cs_anglestriangles

   ABCD is a square and APB is an equilateral triangle. Prove in each case:  1) &#x2206APD ≅ &#x2206BPC    2) Find the angles of &#x2206DPC Solution : First PartGiven &#x2206ABP = Equilateral triangleR.T.P.1) &#x2206APD ≅ &#x2206BPC    2) Find &#x2220DPC, Read more

Apr 22

Sums of Speed Distance and Time Part 3 | Mathematics Class 8

Urooz AliLeave a commentmc8sz_speeddistanceandtime

Three sums of speed distance and time are discussed in the video. The sums are given here.     1. A train 150 m long passes a telegrah post in 15 seconds.Find:a) Speed of the train in km/hr. b) Time Read more

Apr 15

Speed Distance and Time For Class 8 | Part 2 Mathematics | Relative Speed of Boat

Urooz AliLeave a commentmc8sz_speeddistanceandtime

In this video sums related to relative speed of boat in standstill water stream and in a water stream having speed in the same direction and also in the opposite direction have been discussed. Watch the video and comment below. Read more

Apr 15

Theorem: Tangent and Radius of a Circle | are Perpendicular to Each Other.

Urooz AliLeave a commentmc8sz_theorem

Theorem :Tangent and radius of a circle are perpendicular to each other. Solution : Given: A circle with centre O. AB is the tangent to the circle at point B and OB is the radius of the circle.R.T.P. OB &#x22A5 Read more

Apr 12

Theorem : The Angle in a Semi-Circle is a Right Angle

Urooz AliLeave a commentmc8sz_theorem

Theorem: The angle in a semicircle is a right angle Given : A circle with centre 0 with  &#x2220A0B at centre and  &#x2220ACB at the circumference of the circle . RT.P. : the angle in a semicircle is a right Read more

Apr 08

Theorem : Opposite Angles of a Cyclic Quadrilateral are Supplementary | Class 8

Urooz AliLeave a commentmc8sz_theorem

Theorem : Opposite Angles of a Cyclic Quadrilateral are Supplementary. Solution : Given: ABCD is a cyclic quadrilateral.R.T.P.(Require To Prove) 1. &#x2220BAD + &#x2220BCD = 1800      2. &#x2220ABC + &#x2220ADC = 1800 Construction : Join OB and OD Read more

Apr 02

Theorem | the angle subtended by an arc of a circle | at the centre is double the angle subtended by it at | any point on the remaining part of the circle

Urooz AliLeave a commentmc8sz_theorem

Theorem : A circle  with centre O in which AB subtends  &#x2220AOB at centre and angle &#x2220ACB at any point  on the remaining part of the circle. R.T.P. – &#x2220AOB =  2 x &#x2220ACB Solution : Construction: Join CO and Read more

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