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

a=18cm , b=20cm , c=22cm s= a+b+c/2 s= 18+20+22/2 s=60/2 =30cm Area of triangle= √s(s-a)(s-b)(s-c) =√30(30-18)(30-20)(30-22) =√30(12)(10)(8) =√2×3×5×2×3×2×2×5×2×2×2 =2×3×5×2×2√2 cm² =120√2cm²

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Dhruv Gupta 1 year, 8 months ago

240 cm²

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ANSWER

Ch 10

Posted by Khush Brar 1 year, 8 months ago

CBSE > Class 09 > Mathematics

0 answers

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Pagal ha tu

Posted by Aditya Mahajan 1 year, 8 months ago

CBSE > Class 09 > Mathematics

3 answers

Impana Ammu 1 year, 8 months ago

Impana

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Impana Ammu 1 year, 8 months ago

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Aditya Mahajan 1 year, 8 months ago

Bala bal

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1+3/2

Posted by Sudhakar R Singh 1 year, 8 months ago

CBSE > Class 09 > Mathematics

5 answers

Harshita Gupta 1 year, 8 months ago

1Thank You

Dhruv Gupta 1 year, 8 months ago

2.5

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Akhilendra Pratap Gopalan Gopalan 1 year, 8 months ago

2 , 6

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Aman Patel 1 year, 8 months ago

0.23

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Shivanshi Mishra 1 year, 8 months ago

2.5

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Find the height of cylinder whose curved surface area is 226m^2

Posted by Shivraj Gupta 1 year, 8 months ago

CBSE > Class 09 > Mathematics

0 answers

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Find the mean of following numbers are 20,22,25,28,30

Posted by Akash Deep 1 year, 8 months ago

CBSE > Class 09 > Mathematics

3 answers

Vishal Ruhela 1 year, 8 months ago

Mean formula sum of observation/ no of observation 20+22+25+28+30= 125 ÷ 5 = 25

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Vishal Ruhela 1 year, 8 months ago

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Vineet Yadav 1 year, 8 months ago

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Find the area of a triangle two side of the triangle are 18 cm, and 12 cm, and the perimeter is 40 cm.

Posted by Aqsa Lohar 1 year, 8 months ago

CBSE > Class 09 > Mathematics

1 answers

Aditi Bhat 1 year, 8 months ago

First find third side by applying Pythagoras theorem then use herons formula to find area

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In triangle XYZ, XY=8 cm,YZ=11cm,XZ=6cm. Semisphere of triangleXYZ=-------cm

Posted by Luky Raj 1 year, 8 months ago

CBSE > Class 09 > Mathematics

0 answers

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the longest chord of a circle is. radius of the circle

Posted by Aryansinh Solanki 1 year, 8 months ago

CBSE > Class 09 > Mathematics

5 answers

Keya Prajapati 1 year, 8 months ago

False

2Thank You

Keya Prajapati 1 year, 8 months ago

True

1Thank You

Guddu Hgh 1 year, 8 months ago

False.... diameter is the longest chord of the circle.

1Thank You

Srishti Gupta 1 year, 8 months ago

Double

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Aryansinh Solanki 1 year, 8 months ago

1. Equal 2.half 3. double

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x+b-c

Posted by Nayeem Akhtar 1 year, 8 months ago

CBSE > Class 09 > Mathematics

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The diameter of a sphere is increases by 25%. By what percent does its curved surface area increase?

Posted by Gunjan Singh 1 year, 8 months ago

CBSE > Class 09 > Mathematics

2 answers

Keya Prajapati 1 year, 8 months ago

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Mukund Bind 1 year, 8 months ago

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In the given fig o is the centre of circle then the angle ADC

Posted by Aditya Nirmal 1 year, 8 months ago

CBSE > Class 09 > Mathematics

2 answers

Aditya Nirmal 1 year, 8 months ago

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Krishna Ediwal 1 year, 8 months ago

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If a+b+c=9 , ab+bc+ca=26, find a²+b²+c².also find the value of a³+b³+c³-3abc

Posted by S Kumari 1 year, 8 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

The three rational numbers between 3 and 4

Posted by Rishi Saxena 1 year, 8 months ago

CBSE > Class 09 > Mathematics

1 answers

Hisham Ah 1 year, 8 months ago

31/10 ,32/10,33/10,34/10......

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The area of the circle is 841πcm² , then find the length of the longest chord of the circle

Posted by Punya V 1 year, 8 months ago

CBSE > Class 09 > Mathematics

2 answers

Srishti Gupta 1 year, 8 months ago

Circumference=2πr 841π=2πr => 841= 2r =>r= 841/2 =>r= 42.5 cm D=2r D=2. 42.5 D=85 cm Therefore, length of longest chord is 85 cm

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Sudhir Kumar 1 year, 8 months ago

58cm

2Thank You

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factorise 8 x³ + √27y³

Posted by Kashish Prajapati 1 year, 8 months ago

CBSE > Class 09 > Mathematics

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myCBSEguide No products in the cart. Homework Help CBSE Class 09 Mathematics Ajay lives in Delhi, The city … CBSE, JEE, NEET, CUET CBSE, JEE, NEET, CUET Question Bank, Mock Tests, Exam Papers NCERT Solutions, Sample Papers, Notes, Videos Ajay lives in Delhi, The city of Ajay's father in laws residence is at Jaipur is 600 km from Delhi. Ajay used to travel this 600 km partly by train and partly by car. He used to buy cheap items from Delhi and sale at Jaipur and also buying cheap items from Jaipur and sale at Delhi. Once From Delhi to Jaipur in forward journey he covered 2x km by train and the rest y km by taxi. But, while returning he did not get a reservation from Jaipur in the train. So first 2y km he had to travel by taxi and the rest x km by Train. From Delhi to Jaipur he took 8 hrs but in returning it took 10 hrs. Posted by Shyam Patel 1 month ago

Posted by Utkarsh Singh 1 year, 8 months ago

CBSE > Class 09 > Mathematics

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In the above figure.AOB is a straight line.if AOC+BOD=85°.then COD is

Posted by Prabh Randhawa 1 year, 8 months ago

CBSE > Class 09 > Mathematics

4 answers

Sudhir Kumar 1 year, 8 months ago

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Prabh Randhawa 1 year, 8 months ago

Anyone know the answer please send😃

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Nimitt Jain 1 year, 8 months ago

Can you please send the figure

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Radhika Pawar 1 year, 8 months ago

😅

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molybdinum,

Posted by Nirmal Agarwal 1 year, 8 months ago

CBSE > Class 09 > Mathematics

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