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

Let side of triangle is a,b and c a= 18cm b= 10cm c= x Perimeter of triangle= a+b+c 42=18+10+x 42=28+x x= 42-28 x=14 So, c=14 semi perimeter=a+b+c/2 18+10+14/2 42/2=21 area of triangle by heron's formula √s(s-a)(s-b)(s-c) √21(21-18)(21-10)(21-14) √21x3x11x7 √3x7x3x11x7 (pair by of 3 and 7) 3x7√11 Ans-21√11

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In the given figure bo and co are bisectors of angle b and angke c respectively. If angle is 50 then boc

Posted by Greeshma Gs 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Annu Kumari Dhaker 4 years, 2 months ago

Figure

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An irrational number between 1/7 and 2/7 is a) 1/2(1/7+2/7) b) 1/7×2/7 c) root(1/7×2/7) d) None

Posted by Kanishkar A 4 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Tanisha Khandelwal 4 years, 2 months ago

None

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Lalbabu Nishad Lalbabu Nishad 4 years, 2 months ago

Hgxt

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A hemispherical bowl is made of steel , 0.25 cm thick . The inner radius of the bowl is 5 cm . Find the outer curved surface area of the bowl

Posted by Ansh Gupta 4 years, 2 months ago

CBSE > Class 09 > Mathematics

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A number of friends decided to go on a picnic and planned to spend Rs.750/- on snacks. However, 5 of them didn't turn up. As a result, the remaining ones had to contribute Rs.25/- each extra. The number of friends who attended the picnic was:

Posted by Biswajit Satapathy 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Ekaansh Chandak 8141-11 4 years, 2 months ago

15 students were going to the picnic but 5 didn't turn up so total students go to the picnic were 10

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. Show that p(x) = x3 – 3x2 + 2x – 6 has only one real zero. 3.

Posted by Prince Kumar 4 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Shatakshi Sarda 4 years, 2 months ago

Let the number of persons be x. Then, x−496−x96=4⇔x−41−x1=964⇔x(x−4)x−(x−4)=241 ⇔x2−4x−96=0⇔(x−12)(x+8)=0⇔x=12 So, required number =x−4=8.

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Sancha Maya 4 years, 2 months ago

어험가쩌쏘 떷텊초 추흐ㅛ허모

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Please provide the syllabus for unit3 and sample paper

Posted by Arush Shukla 4 years, 2 months ago

CBSE > Class 09 > Mathematics

0 answers

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Multiply directly 103×107

Posted by Minu Singh 4 years, 2 months ago

CBSE > Class 09 > Mathematics

5 answers

Purnima Sharma 4 years, 2 months ago

11021

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Ansh Gupta 4 years, 2 months ago

11021

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Tanvi Devi 4 years, 2 months ago

11021

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Harshit Hindocha 4 years, 2 months ago

11021

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Aman Saha 4 years, 2 months ago

11021

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If the diagonals of a parallelogram are equal, then show that it is a rectangle

Posted by Prince Kumar 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Arya Shandilya? 4 years, 2 months ago

Yep bro

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2x-4xy^2+5x^2y^3

Posted by Bbb Aaa 4 years, 2 months ago

CBSE > Class 09 > Mathematics

0 answers

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Where is orthocenter in right angle triangle

Posted by Bhumika Soni 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

K_Hushii 🍁 4 years, 2 months ago

Right angled vertex

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if x is positive real number and x²=2 then x³=

Posted by Ruhi Singh 4 years, 2 months ago

CBSE > Class 09 > Mathematics

4 answers

Minu Singh 4 years, 2 months ago

2√2

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K K 4 years, 2 months ago

2√2

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Sunil Kumar Shah 4 years, 2 months ago

2✓2

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Bhumika Soni 4 years, 2 months ago

2✓2

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Maths chapter 8 all theorems

Posted by Anu Balmiki 4 years, 2 months ago

CBSE > Class 09 > Mathematics

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the value of x^2=5,x^4=

Posted by Himanshu Yadav 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Bhumika Soni 4 years, 2 months ago

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Factories x^2+5x-24

Posted by Harshith Raj Kn 4 years, 2 months ago

CBSE > Class 09 > Mathematics

0 answers

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2.2+2.4

Posted by Yatharth Srivastava 4 years, 2 months ago

CBSE > Class 09 > Mathematics

4 answers

Priya Pachori 4 years, 2 months ago

4.6

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?Amrita Deshpremi? 4 years, 2 months ago

It's 4.6

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K K 4 years, 2 months ago

4.6

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Kartik Arya 4 years, 2 months ago

2+2

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Excercise 5.4 5TH QUESTION

Posted by Siddiq Siddiq 4 years, 2 months ago

CBSE > Class 09 > Mathematics

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Random

Posted by Sunil Kumar 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Akash Kumar Prasad 4 years, 2 months ago

???

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What is the area of a triangle of three sides are 9,5 and 9 cm

Posted by Abdul Hannan 4 years, 2 months ago

CBSE > Class 09 > Mathematics

3 answers

Abdul Hannan 4 years, 1 month ago

My question is that what is the gravity of Mars

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Lovepreet Kaur Kalsi 4 years, 2 months ago

21.61 cm^2

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K C 4 years, 2 months ago

21.61 cm²

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Prove that √3 is an irrational number

Posted by Vipin Yadav 4 years, 2 months ago

CBSE > Class 09 > Mathematics

3 answers

Himanshu Yadav 4 years, 2 months ago

The number which square have positive called real number

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Aman Harsh 4 years, 2 months ago

Yes

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Pubg Funny Movements 4 years, 2 months ago

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16,32,120 LCM 2

Posted by Nisha Mállíçk 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Aman Harsh 4 years, 2 months ago

2×2×2×2×2×3×5

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√32 sum √48 | √8 sum √12

Posted by Vipin Yadav 4 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Vipin Yadav 4 years, 2 months ago

2 ha

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Vipin Yadav 4 years, 2 months ago

Shai ha

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Prove that segment joining the mid point of non parellel side of trapezium is parellel to the parellel side and it's length is equal to half of the sum of lengths of parellel sides

Posted by Abhishek Jiskar 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

K C 4 years, 2 months ago

Let E and F are midpoints of the diagonals AC and BD of trapezium ABCD respectively. Draw DE and produce it to meet AB at G Consider △AEG and △CED ⇒ ∠AEG=∠CED [ Vertically opposite angles ] ⇒ AE=EC [ E is midpoint of AC ] ⇒ ∠ECD=∠EAG [ Alternate angles ] ⇒ △AEG≅△CED [ By SAA congruence rule ] ⇒ DE=EG ---- ( 1 ) [ CPCT ] ⇒ AG=CD ----- ( 2 ) In △DGB E is the midpoint of DG [ From ( 1 ) ] F is midpoint of BD ∴ EF∥GB ⇒ EF∥AB [ Since GB is part of AB ] ⇒ EF is parallel to AB and CD. Also, EF=21GB ⇒ EF=21(AB−AG) ⇒ EF=21(AB−CD) [ From ( 2 ) ]

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The floor of a rectangular hall has a perimeter 250m

Posted by Mansi Bhati 4 years, 2 months ago

CBSE > Class 09 > Mathematics