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ANSWER

State and prove Angle sum property of a triangle

Posted by Nitin Kumar Jain 3 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 3 years, 10 months ago

ANSWER

Chapter 8 exercise 8.1 question no 1 The angles of quadrilateral are in the ratio 3:5:9:13. Find the all angles of the quadrilateral

Posted by Priyansh Yadav 3 years, 10 months ago

CBSE > Class 09 > Mathematics

3 answers

Devil Ninja Gurpanish 3 years, 10 months ago

Let the four angles of the quadrilateral be 3x, 5x, 9x and 13x 3x+5x+9x+13x=360 [sum of all angles of the quadrilateral is 360° ] 30x=360 ∘ x=12 Hence, the angles of the quadrilateral are 3×12 ° =36 ° 5×12 ° =60 ° ,9×12 =108° and13×12° =156°

Hema Das 3 years, 10 months ago

Let the angles be 3x, 5x, 9x and 13x => 3x+5x+9x+13x=360∘ [the sum of all angles of a quadrilateral is 360∘] =>30x=360∘ => x=360°÷30 => x=12° Thus, the angles of the quadrilateral are 3×12∘=36∘ 5×12∘=60∘ 9×12∘=108∘ 13×12∘=156∘

Yogita Ingle 3 years, 10 months ago

Let the four angles of the quadrilateral be 3x, 5x, 9x and 13x
3x+5x+9x+13x=360^∘ [sum of all angles of the quadrilateral is 360^∘]
30x=360^∘
x=12^∘
Hence, the angles of the quadrilateral are 3×12^∘=36^∘, 5×12^∘=60^∘,9×12^∘=108^∘and13×12^∘=156^∘

ANSWER

Find the amount of water displaced by a solid spherical ball of diameter 0.21m

Posted by Piya Yadav 3 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 3 years, 10 months ago

Find the amount of water displaced by a solid spherical ball of diameter 0.21m

A n s w e r :

Radius (r) of ball = (0.21/2) m = 0.105 m

Therefore, the volume of the sphere is 0.004851 m³.

ANSWER

Find the amount of water displaced by a solid spherical ball of diameter 28 cm

Posted by Piya Yadav 3 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 3 years, 10 months ago

Given: Diameter of the spherical ball (d)= 28 cm

Radius =d/2= 28/2 cm = 14 cm

Amount of water displaced by a solid spherical ball = Volume of spherical ball = 4/3πr³

= (4/3 × 22/7 × 14 × 14 × 14)
= 34496/3 = 11498.67 cm³

Amount of water displaced by a solid spherical ball= 11498.67 cm³

ANSWER

900000000000000000/20000000 Don't use Calucrater

Posted by Pavan I 3 years, 10 months ago

CBSE > Class 09 > Mathematics

3 answers

Rohit Rathore 3 years, 10 months ago

45,000,000,000 check it this is your answer it takes a lot of time to do without calculator because counting of zero is too tough in this question.If the answer is right then please give me a like.Thanks

Nidhi Kaurav 3 years, 10 months ago

???

Queen 14 3 years, 10 months ago

Without using calculator My answer is 45,000,000,000 Check and reply me and if it is write then give a like

ANSWER

What is an whole number

Posted by Pavan I 3 years, 10 months ago

CBSE > Class 09 > Mathematics

3 answers

Rohit Rathore 3 years, 10 months ago

The whole number starts from 0 (zero) to infinite.for eg.0,1,2,3,4,5 ...................and so on.

Yogita Ingle 3 years, 10 months ago

The numbers 1,2, 3, are called natural numbers or counting numbers.
Let us add one more number i.e., zero (0), to the collection of natural numbers. Now the numbers are 0,1,2, … These numbers are called whole numbers
We can say that whole nos. consist of zero and the natural numbers. Therefore, except zero all the whole nos. are natural numbers.
Facts of Whole numbers
1) The smallest natural number is 1.
2) The number 0 is the first and the smallest whole nos.
3) There are infinitely many or uncountable number of whole-numbers

Pavan I 3 years, 10 months ago

????

ANSWER

In the given figure, the measure of ABC is :

Posted by Sahil Chopade 3 years, 10 months ago

CBSE > Class 09 > Mathematics

2 answers

Pavan I 3 years, 10 months ago

??????????????

Bhagwati Bishnoi 3 years, 10 months ago

9th ki book ke important question

ANSWER

Find the remainder when x^3+3x^2+3x+1 is divided by x-1

Posted by Hasan Bawoor 3 years, 10 months ago

CBSE > Class 09 > Mathematics

2 answers

Gaurav Seth 3 years, 10 months ago

A n s w e r

Apply remainder theorem
=> x - 1 =0
=> x = 1
Replace x by 1 we get
=> x³+ 3x² + 3x + 1
=>(1)³ + 3(1)² + 3(1) + 1
=> 1 + 3 + 3 + 1
=> 8
Remainder is 8

Daksh Maru 3 years, 10 months ago

ANSWER

Which is very difficult chapter in math of 9th class

Posted by Rishab Yadav 3 years, 10 months ago

CBSE > Class 09 > Mathematics

4 answers

Harish Ss 9 months, 1 week ago

To say the diffucult chapter is , Circles . You need to concentrate more in those theorems . If you are okay with theorems, You will ace 9th maths

Rohit Rathore 3 years, 10 months ago

The most difficult chapter in mathematics in class 9th is euclids'geometry(chapter5) but in new syllabus resumed by cbse this chapter is removed.So I don't take stress about this chapter .

Piyush Kumar 3 years, 10 months ago

if u think this chapter is difficult then u never solve it.

Vansh Kumar 3 years, 10 months ago

ANSWER

Which is very diffcult chapter įn class9.......

Posted by Black Yadav 3 years, 10 months ago

CBSE > Class 09 > Mathematics

3 answers

Sahil Chopade 3 years, 10 months ago

In the given figure, the measure of ABC is :

Daksh Maru 3 years, 10 months ago

No one

Vansh Kumar 3 years, 10 months ago

ANSWER

Please tell me 5 Q's of statics exercise 14.1

Posted by Srishty Negi 3 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 3 years, 10 months ago

1. Give five examples of data that you can collect from your day-to-day life.

Solution:

Five examples from day-to-day life:

Number of students in our class.
Number of fans in our school.
Electricity bills of our house for last two years.
Election results obtained from television or newspapers.
Literacy rate figures obtained from Educational Survey

2. Classify the data in Q.1 above as primary or secondary data.

Solution:

Primary data: when the information was collected by the investigator herself or himself with a definite objective in her or his mind, the data obtained is called primary data.

Primary data; (i), (ii) and (iii)

Secondary data; when the information was gathered from a source which already had the information stored, the data obtained is called secondary data

Secondary data; (iv) and (v)

ANSWER

2+3+7+6+9+34+8

Posted by Hritik Kumar 3 years, 10 months ago

CBSE > Class 09 > Mathematics

2 answers

Pavan I 3 years, 10 months ago

Black Yadav 3 years, 10 months ago

ANSWER

Write an integer

Posted by Anmol Singhal 3 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 3 years, 10 months ago

In Maths, integers are the numbers which can be positive, negative or zero, but cannot be a fraction.

The examples of integers are, 1, 2, 5,8, -9, -12, etc. The symbol of integers is “Z“.

ANSWER

12.1 Introduction

Posted by Muskan Shah 3 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

ex 11,1class 9

Posted by Anas Khan 3 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 3 years, 10 months ago

. Construct an angle of 90° at the initial point of a given ray and justify the construction.

Construction Procedure:

To construct an angle 90°, follow the given steps:

1. Draw a ray OA

2. Take O as a centre with any radius, draw an arc DCB is that cuts OA at B.

3. With B as a centre with the same radius, mark a point C on the arc DCB.

4. With C as a centre and the same radius, mark a point D on the arc DCB.

5. Take C and D as centre, draw two arcs which intersect each other with the same radius at P.

6. Finally, the ray OP is joined which makes an angle 90° with OP is formed.

Justification

To prove ∠POA = 90°

In order to prove this, draw a dotted line from the point O to C and O to D and the angles formed are:

From the construction, it is observed that

OB = BC = OC

Therefore, OBC is an equilateral triangle

So that, ∠BOC = 60°.

Similarly,

OD = DC = OC

Therefore, DOC is an equilateral triangle

So that, ∠DOC = 60°.

From SSS triangle congruence rule

△OBC ≅ OCD

So, ∠BOC = ∠DOC [By C.P.C.T]

Therefore, ∠COP = ½ ∠DOC = ½ (60°).

∠COP = 30°

To find the ∠POA = 90°:

∠POA = ∠BOC+∠COP

∠POA = 60°+30°

∠POA = 90°

Hence, justified.

For more click on the given link:

<a href="https://mycbseguide.com/blog/ncert-solutions-for-class-9-maths-exercise-11-1/" ping="/url?sa=t&source=web&rct=j&url=https://mycbseguide.com/blog/ncert-solutions-for-class-9-maths-exercise-11-1/&ved=2ahUKEwjcspLywbHtAhU54zgGHafxBXwQFjALegQICxAC" rel="noopener" target="_blank">NCERT Solutions for Class 9 Maths Exercise 11.1 ...</a>

ANSWER

If x=8 ,find the value of x²+x-5

Posted by Kanika Chaurasia 3 years, 10 months ago

CBSE > Class 09 > Mathematics

5 answers

Kripa Daga 3 years, 10 months ago

Given :x=8 x²+x-5 (8)² + 8-5 64+8-5 72-5 67

Bhoomika Garg 3 years, 10 months ago

Yogita Ingle 3 years, 10 months ago

Sorry by-mistake added x = 6 in place of x= 8.

Shweta Singh 3 years, 10 months ago

Let p(x)=x^2 +x-5 Putting x=8 in p(x) = (8)^2+8-5 = 64+8-5 = 64+3 = 67

Yogita Ingle 3 years, 10 months ago

Put x = 8

x²+x-5

= (6)²+ 6 - 5

= 36 + 1

= 37

ANSWER

Prove that each angle of equilateral triangle is of 60 degre

Posted by Ankur Pal 3 years, 10 months ago

CBSE > Class 09 > Mathematics

4 answers

Srishty Negi 3 years, 10 months ago

All angles of equilateral triangle is equal x+x+ x= 180 3x = 180 x= 180/3= 60

Ankur Pal 3 years, 10 months ago

Not sufficient

Khushi Vats 3 years, 10 months ago

By angle sum property we know that the sum of all the angles of a triangle is 180o We know that all the sides of a triangle are equal. i.e all the angles of an equilateral triangle are equal. Let each angle be x. x+x+x=180 60o 3x = 180 ⇒x = 60 Hence the answer.

Soham Basu 3 years, 10 months ago

ANSWER

Formula for csa and lsa of cuboid, cube, cone, cylinder and hemisphere

Posted by Acbu Roy 3 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Kripa Daga 3 years, 10 months ago

??????:- ???=2(bh+hl) ???=2(lb+bh+hl) ????:- ???=4a² ???=6a² ????:- ???=πrl ???=πr(r+l) ????????:- ???=2πrh ???=2πr(r+h) ??????????:- ???=2πr² ???=3πr²

ANSWER

976541245*987

Posted by Chirag Chimnani 3 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Black Yadav 3 years, 10 months ago

963846208815

ANSWER

In which of the following figures, diagonals are equal 1) Parallelogram 2) Rhombus 3) Trapezium 4) Rectangle

Posted by Akash Varshney 3 years, 10 months ago

CBSE > Class 09 > Mathematics

5 answers

Black Yadav 3 years, 10 months ago

Rhombus

Kripa Daga 3 years, 10 months ago

4) rectangle

Lakshya Maharia 3 years, 10 months ago

Rectangle

Akash Varshney 3 years, 10 months ago

Really??!!

H G 3 years, 10 months ago

Rhombus

3Thank You

ANSWER

Median is 120 and mean is 124 then solve the relation mode = 3median - 2mean

Posted by Prashant Patel 3 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 3 years, 10 months ago

Median =120 and mean = 124

mode = 3median - 2mean

mode = 3(120) - 2(124)

mode = 360 - 248 = 112