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ANSWER

In fig triangle ABC is an equilateral triangle in which AD is perpendicular to BC prove that 3AD×AD = 4AD×AD

Posted by Aadil Raza 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 4 months ago

In equilateral {tex}\Delta ABC{/tex}, AD{tex}\perp{/tex}BC
and AB=BC=CA
Also BD={tex}\frac{BC}{2}{/tex}.....(1)
So, {tex}\Delta ABD{/tex} is right-angled triangle
By the Pythagoras theorem,
AB²= AD²+ BD²
{tex}\Rightarrow{/tex} AB²= AD²+ ({tex}\frac{BC}{2}{/tex})²
{tex}\Rightarrow{/tex} AB²= AD²+ {tex}\frac{BC^2}{4}{/tex}
{tex}\Rightarrow{/tex} 4AB²= 4AD²+ BC²
{tex}\Rightarrow{/tex} 4AB²= 4AD²+ AB² (AB = BC)
{tex}\Rightarrow{/tex} 4AB²= 4AD²+ AB²
{tex}\Rightarrow{/tex} 4AB²- AB²= 4AD²
{tex}\Rightarrow{/tex} 3AB²= 4AD²
Hence Proved.

ANSWER

Find the middle term of the AP 6,13,20------,216?

Posted by Manisha Yadav 6 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Ayush Dubey 6 years, 11 months ago

111 find number of terms then use formula of middle term it is 16th Find 16th term

Anshika Pal???? 6 years, 11 months ago

111 is the answer

. . 6 years, 11 months ago

121

ANSWER

Find the middle term of an AP 6

Posted by Manisha Yadav 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Prove that the ratio of the areas of similar triangle is equal to the ratio of the squares of any two corresponding sides

Posted by Saqueeb Khan 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Poonam Jyoti? 6 years, 11 months ago

Ram please improve your hand writing Because Board ka Liya difficult ho jyaga

ANSWER

More than ogive graph

Posted by Seema Singh 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Rahul Raj 6 years, 11 months ago

It's too simple always remember just opposite more and less means lower limit and cf

ANSWER

ABCD is a cyclic quadrilateral if angle BAC is equal to 50 degree and angle b DBC is equal to 60 degree then find angle BCD

Posted by Himanshu Tiwari 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 6 years, 11 months ago

Angle BAC = Angle BDC (Angles in the same segment)

Angle BDC= 50 degree

In triangle BDC,

Angle BDC + Angle BCD + Angle DBC = 180 degree (Angle sum property)

50 degree + Angle BCD + 60 degree = 180 degree

110 degree + Angle BCD = 180 degree

Angle BCD = 70 degree

ANSWER

Given a right-angle triangle ABC in which AngleB =90°,a circle is drawn with AB as diameter intersecting the hypotenuse AC at P. Prove that tangent to the circle at P bisect BC.

Posted by Anurag Singh 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Poonam Jyoti? 6 years, 11 months ago

By using BPT theorem

ANSWER

If the nth term of arithmetic progression is, -1,4,9,14...............129. Find the value of n.

Posted by Payal Priyadarshani Pati 6 years, 11 months ago

CBSE > Class 10 > Mathematics

5 answers

Aayushi Tyagi 6 years, 11 months ago

Use formula an =a+(n-1)×d 129=-1+(n-1)×5 130=5n-5 135÷5=n 27=n

Aayushi Tyagi 6 years, 11 months ago

Its 27

. . 6 years, 11 months ago

Ram here l is not 149 its 129

Himanshi Sharma 6 years, 11 months ago

N=31

Ram Kushwah 6 years, 11 months ago

Here a=-1, d=4-(-1)=4+1=5 , l=149

so 149=-1+(n-1)x5

149=-1+5n-5

5n=149+6=155

so {tex}\begin{array}{l}n=\frac{155}5=31\\\end{array}{/tex}

ANSWER

In a triangle ABC ,D and E are points on sides AB and AC respectively, such that DE||BC .If AD=2.4cm AE=3.2 cm DE=2cm and BC=5cm ,find BD and CE.

Posted by Imran Ur Rehman Hockey 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Himanshi Sharma 6 years, 11 months ago

Ya priyanka is ryt..

Priyanka S 6 years, 11 months ago

Use BPT theorem u will get the answer

ANSWER

Find the value of a for which point p(a÷2 ,2) is the mid point of the line segment joining. the point Q(-5 ,4) and R(-1,0)

Posted by Anjali Sharma 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Himanshi Sharma 6 years, 11 months ago

-6

. . 6 years, 11 months ago

-6

ANSWER

. The radii of the ends of a frustum of a cone 45 cm high are 28 cm and 7 cm. Find its volume, the curved surface area and the total surface area

Posted by Shriya ?? 6 years, 11 months ago

CBSE > Class 10 > Mathematics

4 answers

. . 6 years, 11 months ago

Is it right or not .plz verify it

. . 6 years, 11 months ago

Vol.=48510 cm cube TSA=8080.47 and CSA=5462.47

Shriya ?? 6 years, 11 months ago

but is ka answer kya hai

. . 6 years, 11 months ago

Put on formulas and then calculate

ANSWER

A circle touches the side of ∆ABC at P and the AB andAC produced at Qand R .If the sides AB BC AC of ∆ABC are 13cm ,15cm,18cm show the AQ=AR= 23cm.

Posted by Kiran Yadav 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

A circle tonche the

Posted by Kiran Yadav 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

A farmer was asked to design a rectangular mango grove whose length is ten metre less than the twice of bresth and the area is 600M² The framer was puzzle how to perform this task. His wife gave an idea t o solve the puzzle . How she solved the puzzle ? Also indicated the value depicted in it.

Posted by Kiran Yadav 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Application of bpt

Posted by Parveen Kumar 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If alpha and beta are the zreoes of polynomial x²-5x +k and alpha - beta =-1.Find the value of k

Posted by Kiran Yadav 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Kiran Yadav 6 years, 11 months ago

How u solve this

Ayush Dubey 6 years, 11 months ago

ANSWER

Show that 3√3 is irrational

Posted by Md Sahil Khan 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Poonam Jyoti? 6 years, 11 months ago

Assumed 3rout 3 is rational But we know rout 3 is irrational So, We assumption is wrong 3rout3 is irrational

ANSWER

All formula in this book

Posted by Cool Cool 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

(C2 ab)x2-(a2 -bc)x+b2 ac=0 has equal roots prove that a=0

Posted by Tarushi Khattar 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 4 months ago

We have, {tex}(c^2-ab)x^2-2(a^2-bc)x+b^2-ac=0{/tex}

Here, {tex}A=(c^2-ab), B=-2(a^2-bc),C=b^2-ac{/tex}

Now, {tex}B^2-4AC =0{/tex}

{tex}4(a^2-bc)^2-4(c^2-ab)(b^2-ac)=0{/tex}

{tex}4(a^2-bc)^2=4(c^2-ab)(b^2-ac){/tex}

{tex}a^4-2a^2bc+b^2c^2=b^2c^2-ac^3-ab^3+a^2bc{/tex}

{tex}a^4-2a^2bc+ac^3+ab^3-a^2bc=0{/tex}

{tex}a^4-3a^2bc+ac^3+ab^3=0{/tex}

{tex}a(a^3-3abc+c^3+b^3)=0{/tex}

{tex}a=0 \ or \ a^3-3abc+c^3+b^3=0{/tex}

{tex}a=0\ or\ a^3+b^3+c^3=3abc{/tex}

Hence proved

ANSWER

Each chapter weithage

Posted by Lakshya Kothari 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Puja Sahoo 6 years, 11 months ago

Yu can check it in google.......?

4Thank You

ANSWER

Mode formulae

Posted by Chada Madhuja 6 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Manan Agarwal 6 years, 11 months ago

Refer to maths ncert at back in summary the correct formula is given of mode

Rahul Raj 6 years, 11 months ago

l+(f1-f0)/(2f1-f0-f2) ×h

3Thank You

Rohit Attri 6 years, 11 months ago

L+(n÷2+cf)÷f× h

ANSWER

Underoot3/4r^2 konse triangle ka formula he please tell me fast

Posted by Anshika Pal???? 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

@ Aashu 6 years, 11 months ago

Its for equilateral triangle ..given in rs agarwall

3Thank You

Anshika Pal???? 6 years, 11 months ago

Its ok i got equilateral

ANSWER

How we can solve the median related question

Posted by Himanshu Choubey 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Rahul Raj 6 years, 11 months ago

It is simple bro... first make cf table and then choose median class (class whose cf is nearly greater than n/2) and find f i.e. frequency of class preciding median class and put it on formula

ANSWER

what is meaning of F1 , F0 & F2 when we find mode

Posted by Shriya ?? 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Puja Sahoo 6 years, 11 months ago

He's right......

4Thank You

Rahul Raj 6 years, 11 months ago

F1 is the frequency of modal class. F0 is the frequency of class preciding modal class.F2 is the frequency of class after modal class.

5Thank You

ANSWER

The radii of two concentric circles are 13 cm and 8 cm. AB is a diameter of the bigger circle and BD is a tangent to the smaller circle touching it at D and intersecting the larger circle at P on producing. Find the length of AP.

Posted by Sanyam Kaushik 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Gaurav Seth 6 years, 11 months ago

R= 8cm
R=13cm
angle ODB= 90 degrees ( BD is tangent)
angle APB =90 degrees ( angle in semicircle)
angle DB0 =ANGLE PBA (COMMON)

SO, BY AA criteria tri APB similar to tri DBO
BY CPST ...... BD/BP=BO/AB= OD/ AP
OD/AP= BO/AB
8/AP=13/26
AP=16 cm

Himanshu Choubey 5 years, 8 months ago

Answer is 19

ANSWER

In a rain water harvesting system ,the rain water from a roof top of 22m×20m drains into a cylindrical tank having diameter of base 2m and height 3.5m ,if the tank is full ,find the rainfall in cm .write your views on water conservation.

Posted by _T_A_N_U_78 ??? 6 years, 11 months ago

CBSE > Class 10 > Mathematics

4 answers

Gaurav Seth 6 years, 11 months ago

Volume of roof= l x b x h
= 22X20 X h

height of roof= height of rainfall

volume of cylinder= 22/ 7 x 1x1 x35/10

and
volume of water on roof = volume of
Water in cylindrical tank

22 X 20 X h = 22/7 1 x 1x35/10
22 X 20 X h = 11
h = 11/440
h = 1/40 m
h = 0.025 m
= 2.5 cm

so the rainfall = 2.5 cm

Rahul Raj 6 years, 11 months ago

Sorry π(100)^2×350 cm^3

Rahul Raj 6 years, 11 months ago

Is it correct?

Rahul Raj 6 years, 11 months ago

Volume of rainwater (in cm)=π(50)^2×350 cm^3

ANSWER

if the circular measure of2angles of a triangle are rspectively 1/2 & 1/3 then the number of degrees in the3rd angle is

Posted by Omkar Gadhe 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Zubair Bangi 6 years, 11 months ago

What time table to follow?????

ANSWER

A regular hexagon is inscribed in a circle find radius of a circle find the area of circle is the area of hexagon is 24 root 3

Posted by Om Garg 6 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

Consider the following figure:

We know that the regular hexagon is a combination of 6 equilateral triangles.
{tex}\therefore{/tex} Area of a hexagon = 6 {tex}\times{/tex} Area of {tex}\Delta O A B{/tex}
{tex}\Rightarrow \text { Area of } \Delta O A B = \frac { 24 \sqrt { 3 } } { 6 } = 4 \sqrt { 3 } \mathrm { cm } ^ { 2 }{/tex}
{tex}\Rightarrow \frac { \sqrt { 3 } } { 4 } ( \text { side } ) ^ { 2 } = 4 \sqrt { 3 }{/tex}
{tex}\Rightarrow ( \text { side } ) ^ { 2 } = 4 \sqrt { 3 } \times \frac { 4 } { \sqrt { 3 } } = 16{/tex}
{tex}\Rightarrow{/tex} side = 4 cm
{tex}\Rightarrow{/tex} Radius of a circle = 4 cm
{tex}\therefore{/tex} Area of a circle {tex}= \pi r ^ { 2 } = 3.14 \times 4 \times 4 = 50.24 \mathrm { cm } ^ { 2 }{/tex}