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

Given : let ABC is a triangle . Angle A = 1 angle B = 2 angle C=3 To prove : Angle 1 + anlge 2 + angle 3 = 180 Construction : draw a line EF through point A , anlge EAB = 4 , angle FAC = 5 Proof : angle 4 + angle 1 + angle 5 = 180 ( linear pair) ........1 Angle 4 = angle 3 (alternate angle) Similarly, angle 5 = angle 2 From equation ..........1 Angle 4 + angle 1+ angle 5 =180 Angle 3+ angle 1+ angle 2 = 180 (since angle 4= angle 3 , and angle 5 = angle 2 ) So, angle 1+ angle 2+ anlge 3= 180 Hence, proved............ Thanks you , I hope you can understand ...........

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If x=l and y=l then find the value of 5x+3y=a

Posted by Priyanshu Pal 4 years, 7 months ago

CBSE > Class 09 > Mathematics

3 answers

Manmohan Keshri 4 years, 7 months ago

A =8

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Fathima Kabeer 4 years, 7 months ago

If x=1 and y=1, 5×1+3×1=8

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Nisha Setia 4 years, 7 months ago

X=1, y=1 . 5x+3y=a. 5×1+3×1=a. 5+3=a. a=8.

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Mr.sharma explains his four childern two boys and two girls about distribution of his pproperty amomg them by a picture of triangle ABC such that DEF are midpoints of sides AB,BC,CA respectively are joined to divide triangle ABC in four triangles as shown figure. If total property is equal to area of ∆ABC and share of each child is equal to area of each of four triangles what does each child has share

Posted by Deepika Mall 4 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Harsh Giri 4 years, 7 months ago

Are you from Deoria.Up

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What is difference between 99.9 and 99.9 bar

Posted by Manisha Jain 4 years, 7 months ago

CBSE > Class 09 > Mathematics

2 answers

Pushkar Goyal 4 years, 7 months ago

99.9 bar = 99.99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999

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Nisha Setia 4 years, 7 months ago

99.9 means ye repeat nhi ho rha And 99.9bar means jo 9 h vo unlimited time repeat hoga To agar koi number unlimited time repeat ho rha h to uske upar (bar) aa jati h For example: 3 ko divide krna h 10 se to answer aayega 0.3333333333333333- - - - - - - - - - - - - To agar etna bada na likhna ho to normally 3 ke upar bar lgakar bhi likh sakte h. ???

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If a=14-6√5,find the value of √a+1/√a

Posted by Mithali Pattanaik?? 4 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

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A triangle having sides a,b and c . if s-a=4cm ,s-b=8cm and s-c=12cm then find the value of a,b and c

Posted by Vijay Kumar 4 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Nisha Setia 4 years, 7 months ago

A=4cm, B=8cm, C=12cm 4+8+12 = 24÷2 S=12 S(s-a) (s-b) (s-c) 12(12-4) (12-8) (12-12) 12(8) (4) (0) Ab enke factor bna lene h 2×3×2 (2×2×2) (2×2) ?. ?. ✌. ✌ Ab enke pair ban jayenge. To sabhi pair me se ek ek nikal lena h or unhe bahar rakhna h or jinka pair nhi bna unhe route (√) me rakhna h 2×2×2√3×2 8√6 answer.????

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Four rational numbers between 3and 4

Posted by Shahid Shaik 4 years, 7 months ago

CBSE > Class 09 > Mathematics

2 answers

J.G Series 4 years, 7 months ago

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Nisha Setia 4 years, 7 months ago

Apne ko 4 rational numbers find krne h To 4+1=5 3 and 4 ko 5 se multiply kr denge 3×5=15 4×5=20 Ab ye jo (15,20) do numbers nikle h enhe nhi likhna enke beech wale 4 numbers likhne h 16,17,18,19????

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Maths previous paper solutions

Posted by Kushal Kim 4 years, 7 months ago

CBSE > Class 09 > Mathematics