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

Time is the indefinite continued progress of existence and events that occur in an apparently irreversible succession from the past, through the present, to the future.Time is a component quantity of various measurements used to sequence events, to compare the duration of events or the intervals between them, and to quantify rates of change of quantities in material reality or in the conscious experience.Time is often referred to as a fourth dimension, along with three spatial dimensions.

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ABCD is quadrilateral prove AB Parallel to CD

Posted by Rajesh Yadav 5 years, 11 months ago

CBSE > Class 09 > Mathematics

3 answers

Anuj Sahu 5 years, 11 months ago

Join the diaginal AC and BD . Then , congruence ^AOB=~^DOC , then , AB = DC ( BY CPCT ). One pair of opposite side equal then , it be a parallelogram. Hence proof.

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Ishant Rathore 5 years, 11 months ago

Yes, this guy is so smart bro

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Pragya Singh 5 years, 11 months ago

Join the diagonal and prove that ∆ABC congruent to ∆CDA then by cpct AB = CD and AB parallel to CD

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Evaluate 4*81(81)^-1/2 *[81^1/2 +81^3/2]

Posted by Kirti Goswami 1 year, 5 months ago

CBSE > Class 09 > Mathematics

0 answers

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Find 2√7 whole cube

Posted by Rakhi Vasodiya11 5 years, 11 months ago

CBSE > Class 09 > Mathematics

2 answers

Ishant Rathore 5 years, 11 months ago

15.8745079

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Indian Gamer 5 years, 11 months ago

= 148.119

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draw a frequency polygon for the following frequency distribution. class interval. 1_10,11_20,21_30,30_40,41_50,51_60. frequency 8,3,6,12,2,7 respectively.

Posted by Bhekhraj Prasad 5 years, 11 months ago

CBSE > Class 09 > Mathematics

0 answers

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Prove that bisectors of angles of a parallelogram forms a rectangle.

Posted by Divyansh Chouhan 5 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 11 months ago

Given: ABCD is a parallelogram. AE bisects ∠BAD. BF bisects ∠ABC. CG bisects ∠BCD and DH bisects ∠ADC
To prove: LKJI is a rectangle
∠BAD + ∠ABC = 180° because adjacent angles of a parallelogram are supplementary

ΔABJ is a right triangle since its acute interior angles are complementary
Similar in ΔCDL we get ∠DLC = 90° and in ΔADI we get ∠AID = 90°
Then ∠JIL = 90° as ∠AID and ∠JIL are vertical opposite angles
Since three angles of quadrilateral LKJI are right angles, hence 4th angle is also a right angle.
Thus LKJI is a rectangle.

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What is sss

Posted by Love Rathore 5 years, 11 months ago

CBSE > Class 09 > Mathematics

4 answers

Indian Gamer 5 years, 11 months ago

Side Side Side it is congurency rule

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Patel Kamlesh 5 years, 11 months ago

Side side congurency rule in the chapter of triangle u will study about this more

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Neha Dahiya 5 years, 11 months ago

Side side side

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Mayank _K 5 years, 11 months ago

Side Side Side congurency in which app the side are equal

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what is trigonometry ratio

Posted by Kumar Thulasi 5 years, 11 months ago

CBSE > Class 09 > Mathematics

2 answers

Yogita Ingle 5 years, 11 months ago

It is defined as the values of all the trigonometric function based on the value of the ratio of sides in a right-angled triangle. The ratios of sides of a right-angled triangle with respect to any of its acute angles are known as the trigonometric ratios of that particular angle.

sine: Sine of an angle is defined as the ratio of the side opposite(perpendicular side) to that angle to the hypotenuse.
cosine: Cosine of an angle is defined as the ratio of the side adjacent to that angle to the hypotenuse.
tangent: Tangent of an angle is defined as the ratio of the side opposite to that angle to the side adjacent to that angle.
cosecant: Cosecant is a multiplicative inverse of sine.
secant: Secant is a multiplicative inverse of cosine.
cotangent: Cotangent is the multiplicative inverse of the tangent.

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Saqib Saif 5 years, 11 months ago

Sinwt

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Posted by Madhav Bansal 5 years, 11 months ago

CBSE > Class 09 > Mathematics

2 answers

Indian Gamer 5 years, 11 months ago

100cm

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Madhav Bansal 5 years, 11 months ago

100

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Find the zero of polynomial 2x+5.

Posted by Student Inquisitive 5 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 11 months ago

2x + 5 = 0

2x = -5

x = -5/2

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Find the median of first ten prime numbers.

Posted by Student Inquisitive 5 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 11 months ago

First 10 prime numbers are 2,3,5,7,11,13,17,19,23,27.
Median = value of (n/2)th observation + value of(n/2 + 1) observation/2
              = value of 5th observation + value of 6th observation/2
              = 11+13/2
              = 24/2
              = 12

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If x=3+√2 then find 1/x^2+x^2

Posted by Sneha Soni 5 years, 11 months ago

CBSE > Class 09 > Mathematics

0 answers

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In which app they take question

Posted by Kish War 5 years, 11 months ago

CBSE > Class 09 > Mathematics

0 answers

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if x=3+ √2 than find x^2+1/x^2

Posted by Mukesh Jain 5 years, 11 months ago

CBSE > Class 09 > Mathematics

0 answers

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In quadrilateral acbd, AC =ADbisects LA

Posted by Ishu Kaushik 5 years, 11 months ago

CBSE > Class 09 > Mathematics

0 answers

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A lending library collects penalty for not returning the book on time as follows. For the 1st 3days the penalty is ₹10 and for every subsequent days the penalty is ₹2. Taking the no.of days as x and the total penalty as y form a equation.

Posted by Sarvesh Mayan 5 years, 11 months ago

CBSE > Class 09 > Mathematics

0 answers

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45+98

Posted by Ñaman Kothari 5 years, 11 months ago

CBSE > Class 09 > Mathematics

4 answers

Partap Gupta 5 years, 11 months ago

143

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Sarvesh Mayan 5 years, 11 months ago

143

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Sagar Chhikara 5 years, 11 months ago

143

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Mayank Rajput 5 years, 11 months ago

143

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Use of 3d snow flakes

Posted by Pragya Mishra 5 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Pragya Singh 5 years, 11 months ago

18√3

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If the length of a diagonal of the cube is 6√3 cm,what is the edge of the cube?

Posted by Adarsh Pandey 5 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Sagar Chhikara 5 years, 11 months ago

Diagonal=√3a Edge=Diagonal/√3 =6√3/√3 =6cm

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what is pie?

Posted by Sahil Dhaka 5 years, 11 months ago

CBSE > Class 09 > Mathematics

3 answers

Ruchi Pal 5 years, 11 months ago

π is represented by 22/7 or 3.14

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Ñaman Kothari 5 years, 11 months ago

The value of π is 22/7

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Aakash Yadav 5 years, 11 months ago

Pie is form of this π type and its value is 22/7

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62728_88282992

Posted by Ashok Pemmala 5 years, 11 months ago

CBSE > Class 09 > Mathematics

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13.1 question 1st

Posted by Piyush Dangi 5 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Kajal Yadav 5 years, 11 months ago

Length 1.5 cm Breath 1.25 cm Height 65m =0.65 cm Area of sheet required= csa of cuboid +lb 2*65/100 (l.5+1.25) +1.5*1.25 1.3(2.75) +1.875 3.575+1.875 5.450m sq. If the cost of 1m sq. Sheet is rupees 20 Then. 5.45 m sq. Is 5.45*20 109 rupees I THINK IT'S HELPFUL TO YOU!!!!!!!!!!!!!!!!!!!!!!!

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what is the sum of angles at a point?

Posted by Student Inquisitive 6 years ago

CBSE > Class 09 > Mathematics

1 answers

Sudhan Nagarajan 6 years ago

360degree

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If the angles of a triangle are in the ratio 1:2:3 determine 3 angles

Posted by Jatin Chaudhary 6 years ago

CBSE > Class 09 > Mathematics

2 answers

Student Inquisitive 6 years ago

Ans:- Let the angles be 1x,2x and 3x By Angle Sum Property of triangle, we have, => 1x+2x+3x = 180° => 6x = 180° => x = 180°/6 => x= 30° Thus, angles of the triangle are- • 1x = 1×30°=30° • 2x=2×30°=60° • 3x=3×30°=90°

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Anushka Chaudhary 6 years ago

30, 60,90

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