CBSE > Class 09 > Mathematics | CBSE Board | Homework Help

It is given that, EB {tex}\parallel{/tex} DL and ED {tex}\parallel{/tex} BL. Therefore, EBLD is a parallelogram.
{tex}\triangle{/tex}DCL {tex}\cong{/tex} {tex}\triangle{/tex}FBL
{tex}\Rightarrow{/tex} DC = BF and DL = FL
Now, BE = DC = AB
{tex}\Rightarrow{/tex} 2AB = 2DC {tex}\Rightarrow{/tex} AF = 2DC
Hence proved.
Since DL = FL (proved above)
{tex}\Rightarrow{/tex} DF = 2DL

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Ranveer Singh 5 years, 5 months ago

Bakwas

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ANSWER

What is the formulla for area of rhombus

Posted by Abdul Rahim 5 years, 5 months ago

CBSE > Class 09 > Mathematics

4 answers

Aarav Nirwal 5 years, 5 months ago

1/2 ×d1×d2

0Thank You

Suman Kumar 5 years, 5 months ago

L*b. If diagonal is given then area =1/2*d1*d2

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Rakshit Goel 5 years, 5 months ago

((Diagonal 1)(diagonal2))/2

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Saniya Sheikh 5 years, 5 months ago

Area of a rhombus=1/2(d1+d2)xh Perimeter of rhombus=4a

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ANSWER

Find the series whose nth term is 3 ratio to the power n minus 1

Posted by Taniya Singla 5 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Kavya Agrawal 5 years, 5 months ago

n = 3^n - 1 2, 8, 26, 80 … OR n = 3^(n-1) 1, 3, 9, 27, 81 ...

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ANSWER

24×57×44+634÷567+4567÷358×24558=?

Posted by Mirza Ayan 5 years, 5 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

What is the formula of trapezium

Posted by Mirza Ayan 5 years, 5 months ago

CBSE > Class 09 > Mathematics

3 answers

Kddh Hgj 5 years, 5 months ago

1/2×(sum of parallel side)×height

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Ayush Kumar ? 5 years, 5 months ago

1/2 ×(a+b)+heigjt

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Lakshmi Karamannaanvar 5 years, 5 months ago

1/2 × sum of parallel sides × height=1/2 (a+b) × h

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ANSWER

Probability of any event E, always lies between 0 and 1.

Posted by Dakshita Dharwal 5 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Seema Devi 5 years, 5 months ago

Yes

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ANSWER

A number is irrational if its decimal representation is: 1-Non- terminating 2- Non- terminating recurring 3-Non- terminating non- recurring

Posted by Dakshita Dharwal 5 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Krishna Upadhyay 5 years, 5 months ago

3-non-terminating non-recurring

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ANSWER

(5+√7)(2+√5) simplify the expression

Posted by Kunj Patel 5 years, 5 months ago

CBSE > Class 09 > Mathematics

4 answers

Utkarsh Aryan 5 years, 5 months ago

5(2+√5)+√7(2+√5) =10+5√5+2√7+√35

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Mohit Gupta 5 years, 5 months ago

=5(2+√5)+√7(2+√5) =10+5√5+2√7+√35 Ans

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Piyush Raj 5 years, 5 months ago

17+7√7

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Piyush Raj 5 years, 5 months ago

(5+√7)(2+√7) =5(2+√7)+√7(2+√7) =10+5√7+2√7+7 =10+7√7+7

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ANSWER

Q.1. (8+3√21)⅓ + (8-3√21)⅓ = ?

Posted by Ankit Raj 5 years, 5 months ago

CBSE > Class 09 > Mathematics

2 answers

Karan Kushwah 5 years, 5 months ago

Formula (a+b)(a-b) =a Square -b square Then, 8square -3√21square = 64-3*3=64-9=55

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Bro . 5 years, 5 months ago

(8⅓+3×21½×⅓)+ (8⅓-3×21½×⅓). (2+21^1/6)+(2-21^1/6). 2+21^1/6+2-21^1/6. 2+2. 4

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ANSWER

Locate root 9 in number line

Posted by Raj Chauhan 5 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Shivam Pal 5 years, 5 months ago

Root 9 =3 And you can easily locate that on no line

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ANSWER

Application questions for heron's formula

Posted by Anzil Muhammed 5 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Piyush Raj 5 years, 5 months ago

The area of a triangle is 750cm² and the sides are in ratio 5:12:13.what is the perimeter of the triangle.

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ANSWER

Show that x-5 is a factor of x cube - 3 x square -4x -30

Posted by Kusum Lata 5 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Naveendeep G N 5 years, 5 months ago

G(x)=x-5 P(x)=x³- 3x²- 4x- 30 =(5)³ - 3(5)² - 4(5) -30 =125- 75- 20 -30 = 125- 75- 50 =125- 125 O =O Therefore, x-5 is factor of x³- 3x²- 4x- 30

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ANSWER

Construct a triangle ABCin which BC=7cm, angle B=75 and AB+AC=13cm

Posted by Bindu Tr 5 years, 5 months ago

CBSE > Class 09 > Mathematics

2 answers

Bindu Tr 5 years, 5 months ago

Thc

1Thank You

Gaurav Seth 5 years, 5 months ago

Given : Base BC = 7cm, angle B = 75° and sum of two sides AB + AC = 13 cm.

Required : To Construct ∆ABC

STEPS OF CONSTRUCTION :

1. Draw a ray BX and cut off a line segment BC = 7cm; from it.

2. At B; construct angle YBX = 75°

3. With B as centre and radius = 13 cm (because AB + AC = 13cm) draw an arc to meet BY at D.

4. Join CD

5. Draw Perpendicular bisector PQ of CD intersecting BD at A.

6. Join AC

Then ABC is the required triangle.

A lies on perpendicular bisector of CD.

Therefore, AC = AD

=> AB = BD - AD

=> AB = BD - AC

=> AB + AC = BD = 13cm

3Thank You

ANSWER

In which quadrants ycoordinates are negative

Posted by Jyoti Bali 5 years, 5 months ago

CBSE > Class 09 > Mathematics

3 answers

Karan Kushwah 5 years, 5 months ago

3and 4

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Vanshikka Singh???? 5 years, 5 months ago

3rd and 4th

1Thank You

Shivam Pal 5 years, 5 months ago

In 3rd and 4th coordinares are negative

2Thank You

ANSWER

(249)square-(248)square will be

Posted by Jyoti Bali 5 years, 5 months ago

CBSE > Class 09 > Mathematics

5 answers

Bro . 5 years, 5 months ago

249²-248². 249+248. 497.ans

2Thank You

Karan Kushwah 5 years, 5 months ago

1*497=497

1Thank You

Yuraj Sarraf 5 years, 5 months ago

(249)square-(248)square (249-248)(249+248) 1*497 =497

1Thank You

Harsh Mishra 5 years, 5 months ago

So, What is the Right Question ????

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Jyoti Bali 5 years, 5 months ago

I am sorry but question is wrong

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ANSWER

If one side of an equilateral triangle is 4 cm .find area

Posted by Sakshi Swarnkar 5 years, 5 months ago

CBSE > Class 09 > Mathematics

4 answers

Bro . 5 years, 5 months ago

s=4+4+4/2. s=12/2. s=6. Area=√(6-4)×(6-4)×(6-4). Area=√2×2×2. Area=√8. Area=2√2.ans

1Thank You

Ashvanth Gopal 5 years, 5 months ago

In a eqalateral triangle all sides are equal so sidea=b=c=4cm by heron's formula you can find the semiperimeter and after that find the area

2Thank You

Diya Save 5 years, 5 months ago

as it is an equilateral triangle hence,side1=side2=side3 area of equiateral triangle =root3 * (side)^2 --------- 4 =root3 * (4)^2 ------------ 4 = root3 * 16 ---------- 4 = root 3 * 4 =4 *root 3

1Thank You

Kabir Arora 5 years, 5 months ago

512 cm^2

4Thank You

ANSWER

5+3×5

Posted by Aalok Aryan Ś 5 years, 5 months ago

CBSE > Class 09 > Mathematics

10 answers

Bro . 5 years, 5 months ago

The answer is 20.

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Karan Kushwah 5 years, 5 months ago

0Thank You

Abdul Miqaeel Mulla 5 years, 5 months ago

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Jyoti Bali 5 years, 5 months ago

0Thank You

Vivek Dhote 5 years, 5 months ago

0Thank You

Ankur Chauhan 5 years, 5 months ago

0Thank You

Shweta Shukla 5 years, 5 months ago

20 according to bodmass

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Mukul Kumar 5 years, 5 months ago

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Renjith Mr 5 years, 5 months ago

0Thank You

A A 5 years, 5 months ago

20 according to bodmas rule

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ANSWER

3x+5y=7.5

Posted by Ãßhîshék Kumar 5 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Renjith Mr 5 years, 5 months ago

x=2.5, y=0 That is, 3×2.5+5×0=7.5

2Thank You

ANSWER

According to cbse what is portfolio which is internal syllabus of class 9

Posted by Shani Pandey 5 years, 5 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Pi is an which number

Posted by Vattal Chary 5 years, 5 months ago

CBSE > Class 09 > Mathematics

2 answers

Jyoti Bali 5 years, 5 months ago

Irrational number

0Thank You

Gaurav Seth 5 years, 5 months ago

irrational number

Pi is a name given to the ratio of the circumference of a circle to the diameter. That means, for any circle, you can divide the circumference (the distance around the circle) by the diameter and always get exactly the same number. It doesn't matter how big or small the circle is, Pi remains the same. Pi is often written using the symbol and is pronounced "pie", just like the dessert.

Pi was irrational, that is, that it can't be written as a ratio of integer numbers.

Because Pi is known to be an irrational number it means that the digits never end or repeat in any known way.

3Thank You

ANSWER

Is zero a rational number can we write in form of p/q

Posted by Adarsh Chaurasia 5 years, 5 months ago

CBSE > Class 09 > Mathematics

6 answers

Vanshikka Singh???? 5 years, 5 months ago

Yes ofcourse

0Thank You

Nihal Kumar 5 years, 5 months ago

yes, we can write 0 in the form of P/q such as 0/1, 0/2, 0/3 etc.

1Thank You

Harsh Mishra 5 years, 5 months ago

Yes, 0 is a rational number (provided that you understand 0 as the symbol of the natural or integer number zero). The definition of a rational number is 'A number that can be written in the form a/b, where a and b are integers with no common factors and b is NOT zero'. 0 can be written as (for example) 0/2......

Well, Frankly saying I'm not sure about it as some says that It Is!!! & Some says It Isn't!!! I don't know what's given in the Book..... But!!! I think so that It Is.....Rational Number.

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Shani Pandey 5 years, 5 months ago

Yes,for example 0/1 it is a rational no.

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Amayra 1111 5 years, 5 months ago

Yes

1Thank You

Shivam Pal 5 years, 5 months ago

0 can't be ratinal no if you divide any no with 0 it be 0 it can't be 0/1 or 0/2

1Thank You

ANSWER

74.22divide 23