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In ΔABC, XY || AC and area of ΔBXY = area of quadrilateral XYCA ⇒ ar (ΔABC) = 2.ar (ΔBXY) ----------------(1) XY || AC and BA is a transversal. ⇒ ∠BXY = ∠BAC --------------------------- (2) So, In ΔBAC and ΔBXY, ∠XBY = ∠ABC (common angle) ∠BXY = ∠BAC [from equation (2)] ⇒ ΔBAC ~ ΔBXY ⇒ ar(ΔBAC) / ar(ΔBXY) = BA2 / BX2 ⇒ BA = √2 BX ⇒ BA = √2 (BA – AX) ⇒ (√2 – 1) BA = √2 AX ⇒ AX/XB = (√2 – 1) / √2

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Rohith Mathew 6 years, 2 months ago

WTF?Geography=\Maths.Ass

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What is (a+b)²

Posted by Himanshu Shahi 6 years, 2 months ago

CBSE > Class 10 > Mathematics

5 answers

Ramana Pirla??? 6 years, 2 months ago

a²+b²+2ab

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Rohit Kumar 6 years, 2 months ago

A square +b square+2ab

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Aadya Singh ? 6 years, 2 months ago

a^2 + b^2 + 2ab

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Palak Genius 6 years, 2 months ago

a2 +b2+2ab

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Rohith Mathew 5 years, 8 months ago

Die you bitch!Suck your *****

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along a road lie an odd number of stones at interval of 10 metres.these stones have to be assembled around the middle stone.a person can carry only one stone at a time.a man carried a job with one of the end stones by carriying them in sucession .in carriying all yhe stones he covered distance 3 km .find the no of stones.

Posted by Elizabeth Debbarma 6 years, 2 months ago

CBSE > Class 10 > Mathematics

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Pair of equation 1/2x+1/3y=2 1/3x+1/2y=13/6

Posted by Ramdas Murmu 6 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

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A ladder 15 m long reaches a window is 9 m above the ground on one side of a street .keeping its foot at the same point the ladder is turned to other side of the street to reach a window 12 m high. Find the width of the strret

Posted by Sneha Mewade 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Ram ? 6 years, 2 months ago

21 m

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15 tan A =14 find 2sin A cos A /cos square A - sin square A

Posted by Sanjay Bhatt 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Ram Kushwah 6 years, 2 months ago

15tanA=14

tanA =14/15

tan2A=2tan2A/1-tan²A

=2*(14/15)/(1-225/196)

tan2A=28/15/29/225=420/29

=======================================

Now 2sinAcosA/cos²A-sin²A

=sin2A/cosA=tan2A

=420/29

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Ch6 ex.6.4 ques.7

Posted by Rajeev Kumar Singh 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Ram Kushwah 6 years, 2 months ago

We know that area of an equilateral triangle with side a

={tex}\sqrt3{/tex} a²/4

now let side of square =x

then area of equilateral triangle on one side

A1={tex}\sqrt3{/tex} x²/4--------------------------(1)

If length of diagonal is d then

d2=x2+x2=2x2

area of equilateral traingle at diagonal

A2=={tex}\sqrt3{/tex} *2x2/4

=2*({tex}\sqrt3{/tex} a²/4)

=2A1

hence proved

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if one bowl is made in 4.5 sec then how many can be maked in 35sec

Posted by Shaad Saifi 6 years, 2 months ago

CBSE > Class 10 > Mathematics

4 answers

Aadya Singh ? 6 years, 2 months ago

Approx 8

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Atharva Jain 6 years, 2 months ago

no its approx 8 7.777

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Atharva Jain 6 years, 2 months ago

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Ashmit Modi 6 years, 2 months ago

Approx 8 is the answer

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A and B are two positive integers such that the least prime factor of A is 3 and the least prime factor of B is 5, then least prime factor of (A+B) is:- (a)3, (b)5, (c)2, (d)1

Posted by Harshita Gidwani 6 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Aadya Singh ? 6 years, 2 months ago

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Qwerty G 6 years, 2 months ago

Option (c) 2 is the right answer.

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When we say a number non terminating without actual division

Posted by Sahil Prasad 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Aadya Singh ? 6 years, 2 months ago

When it's denominator is not in the form of 2^m × 5^n , then the number is non- terminating.

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Find the rational number betwewn root2 and root7.

Posted by Suhani Semwal 6 years, 2 months ago

CBSE > Class 10 > Mathematics

4 answers

Rishi Sharma 6 years, 2 months ago

And you

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Rishi Sharma 6 years, 2 months ago

Reply pls

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Rishi Sharma 6 years, 2 months ago

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Rishi Sharma 6 years, 2 months ago

We know that, √2 = 1.4142135..... √3 = 1.73205080...... As we know that rational numbers are those decimal numbers which are either terminating or repeating. So, you can given any terminating or repeating decimal number between 1.4142135 ...... and 1.73205080 ....... as your answer. Thus your answer can be any of the following rationals: 1.415, 1.416, 1.417, 1.532, 1.582, 1.60, 1.62, 1.70, 1.72 etc. Potenz root 4 (2) is a rational no.between root 2 and root 7...as simple as that :)

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If the roots of the quadratic equation are irrational,the coefficient of the term x will also be irrational

Posted by Raj K 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 2 months ago

True

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if a and b are the roots of the quadratic equation whose roots are aa+b and ab+b

Posted by Laranya Dwivedi 6 years, 2 months ago

CBSE > Class 10 > Mathematics

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Shayra please mujhe maaf kardo

Posted by Akshit Panchal 6 years, 2 months ago

CBSE > Class 10 > Mathematics

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Hiiii hmare friends kha h aaj?

Posted by Akshit Panchal 6 years, 2 months ago

CBSE > Class 10 > Mathematics

5 answers

? ? 6 years, 2 months ago

Yes

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Akshit Panchal 6 years, 2 months ago

Yr use mnane me help to kr diye

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Sahil Singh 6 years, 2 months ago

Hey

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? ? 6 years, 2 months ago

Yhi hu

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⭐⭐⭐Diya⭐⭐⭐ 6 years, 2 months ago

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The length of the minute hand of a clock is 14 cm .find the area swept by the minute hand in 5 min

Posted by Monika Sharma 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Qwerty G 6 years, 2 months ago

Center of angle of sector =360/12=30 Radius of circle =14 cm Area of sector =22/7×14×14×30/360=153/3=51.3333.......

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Prove 100-100÷100-100 = 2

Posted by Vedang Nain 6 years, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Qwerty G 6 years, 2 months ago

(100 -100)/(100-100)=2 (10)^2 -(10)^2/10(10-10) (10+10)(10-10)/10(10-10) (10+10)/10 20/10 =2

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Rufra Pratap Singh Rathore 6 years, 2 months ago

100-100/100-100 =(10+10) (10-10)/10(10-10) =10+10/10 =20/10 =2

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Vedang Nain 6 years, 2 months ago

100-100÷100-100 = 2 =>(10) square+(10) square ÷10 (10-10) =2 =>(10+10)(10-10)÷10(10-10) =2 =>(10+10)÷10=2 =>20÷10=2 =>2=2 Hence proved

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Ex 14.1 and 14.2

Posted by Harsh Sethi 6 years, 2 months ago

CBSE > Class 10 > Mathematics

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Prove converse basic propotionality theorem

Posted by Prasanna Prasanna 6 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Rohit Kumar 6 years, 2 months ago

Converse of Basic Proportionality Theorem Statement If a line divides any two sides of a triangle (Δ) in the same ratio, then the line must be parallel (||) to the third side. Diagram Given In ΔABC, D and E are the two points of AB and AC respectively, such that, AD/DB = AE/EC. To Prove DE || BC Proof In ΔABC, given, AD/DB = AE/EC ----- (1) Let us assume that in ΔABC, the point F is an intersect on the side AC. So we can apply the Thales Theorem, AD/DB = AF/FC ----- (2) Simplify, in (1) and (2) ==> AE/EC = AF/FC Add 1 on both sides, ==> (AE/EC) + 1 = (AF/FC) + 1 ==> (AE+EC)/EC = (AF+FC)/FC ==> AC/EC = AC/FC ==> EC = FC From the above, we can say that the points E and F coincide on AC. i.e., DF coincides with DE. Since DF is parallel to BC, DE is also parallel BC Hence the Converse of Basic Proportionality therorem is proved

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Harsh Sethi 6 years, 2 months ago

Ex14.1

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Compartment question paper class 10th

Posted by Rupesh Joshi 6 years, 2 months ago

CBSE > Class 10 > Mathematics