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

a =12cm, b= 6cm, c=15cm Semiperimeter (s) = ( a+b+c)÷2 = 33÷2= 16.5cm Now, s - a = 16.5 - 12 = 4.5 s - b = 16.5 - 6 = 10.5 s - c = 16.5 - 15 = 1.5 Area = √s( s- a )( s- b)( s- c) =√ 16.5 * 4.5*10.5*1.5 = 287.9 sq.cm

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Evaluate the following using suitable identities (998)³

Posted by Jiya Arya 4 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Deepak Daksh 4 years, 10 months ago

(1000-2)^3

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Y+7 is the equation of a line parallel to

Posted by Jiya Arya 4 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Avinash Raut 4 years, 10 months ago

X axis

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X—4 is the equation of a line parallel to

Posted by Jiya Arya 4 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

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(27)–⅔ is equal to

Posted by Jiya Arya 4 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Suraj Prajapati 4 years, 10 months ago

1/9

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Find 4 line equations passes through (7,-2)

Posted by Thota Jahnavi 4 years, 10 months ago

CBSE > Class 09 > Mathematics

2 answers

Thota Jahnavi 4 years, 10 months ago

This is the full question

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Suraj Prajapati 4 years, 10 months ago

Type the full question please

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(2x+1) +3x

Posted by @Aaaa Ahir 4 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Suraj Prajapati 4 years, 10 months ago

OMG it's too hard?? Answer is 5x+1 Solution : 2x+1+3x 5x+1

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Construct a right triangle whose base is 12 cm and sum of its hypotenuse and other side is 18 cm

Posted by Amir Khan 4 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Suraj Prajapati 4 years, 10 months ago

Steps: Draw a line BC of 12 cm At point B draw angle of 90 degree Draw the line to a point X On BX make an arc of 18 cm name that point D Join C to D Draw perpendicular bisector of CD Join the perpendicular bisector on line BX name the point A Join A to C Therefore, ABC is the required triangle

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If x=7 + underoot 40 find

Posted by Digvijay Maan 4 years, 10 months ago

CBSE > Class 09 > Mathematics

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7(x+2)+(2x-2)=x\2+7(6-x)

Posted by Abhishek Shaw 4 years, 10 months ago

CBSE > Class 09 > Mathematics

2 answers

$Oh∆M Thite 4 years, 10 months ago

X= 84/31

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$Oh∆M Thite 4 years, 10 months ago

84/31

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How we say it is parallelogram

Posted by Shashank Singh 4 years, 10 months ago

CBSE > Class 09 > Mathematics

2 answers

$Oh∆M Thite 4 years, 10 months ago

When quadrilateral has its opp. pairs equal or parallel. - Diagonals bisect each other. - One pair of opp. side is equal and parallel (not like 1st sentence). - Diagonals are angel bisector.

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Tanish Jassal 4 years, 10 months ago

When the quadrilateral have the opposite side are equal and the two lines bisect each other and are at equal same distance between them

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Quadrilaterals practice paper 1 solution

Posted by Shriya Singh 4 years, 10 months ago

CBSE > Class 09 > Mathematics

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If O is a point within a quadrilateral ABCD,show that OA+OB+OC+OD>AC+BD.

Posted by Kishlay Singh 4 years, 10 months ago

CBSE > Class 09 > Mathematics

2 answers

Kishlay Singh 4 years, 10 months ago

My question is right.U can google it.

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Suraj Prajapati 4 years, 10 months ago

Your question is wrong because OA+OC = AC let be 1 equation OB+OD = BD let be 2 equation Adding 1 and 2 equations We get, OA+OB+OC+OD=AC+BD

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Akash bought vegetables weighing 10 kg. Out of this, 3kg500g is onion, 2kg 75g is tomatoes and the rest is potatoes. What is the weight of the potatoes

Posted by Rudra Roy 4 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 4 years, 10 months ago

Given
Total weight = 10kg
Weight of onions = 3.5 kg
Weight of tomatoes = 2.075kg
Let weight of potato be x
⇒ 3.5 + 2.075 + x = 10
⇒ 5.575 + x = 10
⇒ x = 10 - 5.575
⇒ x = 4.425
∴ x = 4kg 425g
Therefore weight of potatoes = 4kg425g

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What is median in easy language ?

Posted by Anshika Vishwakarma 4 years, 10 months ago

CBSE > Class 09 > Mathematics

2 answers

Vanshul Sharda 4 years, 10 months ago

median is the even and odd thing

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Asifa Naaz 4 years, 10 months ago

The line in a triangle from its vertex to its base which bisect the base and divide the triangle into two equal parts

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Find the perimeter of an isosceles triangle having an area of 100 sq.cm

Posted by Harsh Raj 4 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

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Mujhe ch 9 , 10 , and 12 ka all theorem and example ka solution cahiya.

Posted by Dhiraj Roy 4 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Saloni Kumari 4 years, 10 months ago

Itna time to nahi h ki itna theorem ka solution du but aap book khol ke par lo samaj jaoga

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A closed iron tank 12m long, 9mwide and deep is to be made determine the cost of iron sheet used at the rate of rs 5per m sheet ,sheet being 2m wide.

Posted by Vedanta Kachhawa 4 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

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Sanjeev made an arrangement with red and grey colour paper sheets as show in figure.find the total area of the red and grey paper sheets used in making the arrangement

Posted by Janvi Malhotra 4 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

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If ABCD is a rectangle which diagonal are equally bisects each other at centre O. Prove that ABCD is a rhombus

Posted by Harshita Jain 4 years, 11 months ago

CBSE > Class 09 > Mathematics

2 answers

Ayush Bhandari 4 years, 11 months ago

Surface area and volume

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Ishu Narayan 4 years, 6 months ago

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A cylindrical pillar is 50 cm in diameter and 3.5 metre in height find the cost of painting the curved surface of the pillar at the rate of rupees 12.50 per meter2?

Posted by Lav Yadav 4 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 4 years, 11 months ago

Radius = 0.25m
Height = 3.5m
Radius = 1m
CSA = 2pie r h
= 2×22/7×0.25×3.5
= 5.5m^2

Cost of painting one m^2 = 12.50
Cost of painting 5.5m^2 = 12.50 × 5.5
= 68.75 rs.

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4'-5'

Posted by Narayan Behera 4 years, 11 months ago

CBSE > Class 09 > Mathematics