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In angle ABC, if AB = AC and angle B= 20°, then find angle A

Posted by Sheena Kadyan 8 years, 7 months ago

CBSE > Class 09 > Mathematics

3 answers

Aman Raj 8 years, 7 months ago

60

Tanmay Kumar 8 years, 7 months ago

140 degree is the answer

Aman Raj 8 years, 7 months ago

790321

ANSWER

Square of 889

Posted by Akash Kumar 8 years, 7 months ago

CBSE > Class 09 > Mathematics

2 answers

Mudit Shukla 8 years, 7 months ago

889×889=790321

Aman Raj 8 years, 7 months ago

790321

ANSWER

3/4√5-√3+2/4√5+√3=a√5+b√3

Posted by Vineet Gulia 8 years, 7 months ago

CBSE > Class 09 > Mathematics

2 answers

Vineet Gulia 8 years, 7 months ago

Answer is: a=20/77 and b=1/77

Tanmay Kumar 8 years, 7 months ago

Can 3√5+2√3 is answer

ANSWER

ABCD is ouadri

Posted by Akshat Tiwari 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

If a+b+c=9 and ab+bc+ca=26 then find a*a+b*b+c*c

Posted by Mohit Sharma 8 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Tanmay Kumar 8 years, 7 months ago

29 is the answer

ANSWER

X3+y3=x3+y3+3xy(x+y) find x+y=-4

Posted by Shresta Rishikesh 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

(2x-3x)+4(3x+1)

Posted by Pankaj Mishra 8 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Vineet Gulia 8 years, 7 months ago

2x-3x+12x+4 -1x+12x+4 11x+4

ANSWER

How i can score more?

Posted by Pranay Rathore 8 years, 7 months ago

CBSE > Class 09 > Mathematics

3 answers

Vineet Gulia 8 years, 7 months ago

By practising daily all that is done in the school

Gunjan Sabharwal 8 years, 7 months ago

By studying and making a good time table

Ft.Pahadi Bisht 8 years, 7 months ago

By doing maths 10 questions everyday ?

ANSWER

125x 25/x Find the value of x

Posted by Mudit Shukla 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Factorise a3+b3+c3+3abc

Posted by Chandan Maji 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Rationalise 1upon 2underroot2 - 3 underroot 2 + 4 underroot 2

Posted by Arshpreet Kaur 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Factor questions

Posted by Juhi Singh 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

The lateral side and the base of an isosceles triangle are in ratio 5:4. The perimeter of the triangle is 14 cm. Find the area of the triangle.

Posted by Rakesh Choudhary 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

5/11*5/11

Posted by Nitesh Singh 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

How root 7 is represent on number line

Posted by Nisha Saroha 8 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Riddhi Tibriwala 8 years, 7 months ago

Using Pythagoras method u can

ANSWER

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

Posted by Pranjal Trivedi 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Show that sum of three altitude of a triangle is less than the sum of three sides of a triangle.

Posted by Anjali Tiwari 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

How to understand more about linear pair

Posted by Shreya Kumari 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Define frequency curve

Posted by Hemalatha Hemalatha 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

(8/15)^3 - (1/3)^3 - (1/5)^3=x/75 solve equation to find value of x

Posted by Sarvesh Aware 8 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Adeel Khan 8 years, 7 months ago

here a=8/15, b=-1/3, c=-1/5, since here (a+b+c)=0, then a³+b³+c³=3abc, therefore (8/15)³+(-1/3)³+(-1/5)³=x/75, 3 × 8/15 ×1/3 × 1/5 =x/75, 8/75 =x/75, therefore x=8

ANSWER

If 125power x 25 upon 5power x find x.

Posted by Harsh Pawar 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

If 125 power x 25 upon 5 power x

Posted by Harsh Pawar 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

5+5

Posted by Mannu Bansal 8 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Sarvesh Aware 8 years, 7 months ago

10

ANSWER

Angle 1=60 and angle 2= 2/3rd of a right angle . Prove that l||m

Posted by Manish Patel 8 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Adeel Khan 8 years, 7 months ago

l || m if angle 1 and angle 2 are equal. angle 1 =60°, angle 2 =2/3 of 90°, angle 2= 60°, since we have angle 1 = angle 2, therefore l || m.

ANSWER

How can we prove that all the angles of of a triangle are 60°

Posted by Priyanshu Dalakoti 8 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Mehak Gera 8 years, 7 months ago

Make arcs on each angle ND cut out all arcs .....Put them on a straight line forming a semi circle....The semi circle is an angle of 180° ...( Angles on straight line) hence proved

ANSWER

125^x 25÷5^x

Posted by Sarika Rani 8 years, 7 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

if x=3+2root 2find root x+root 1÷x

Posted by Sakshi Priya 8 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Adeel Khan 8 years, 7 months ago

x=(3+2√2), then √x=√(3+2√2), √x=√(2+1+2√2), √x=√[(√2)²+(1)²+2×√2×1], √x=√(√2+1)², √x=(√2+1), therefore √x+1/√x =(x+1)/√x, √x+1/√x =(3+2√2+1)/(√2+1), √x+1/√x =(4+2√2)/(√2+1), √x+1/√x =(4+2√2)(√2-1), √x+1/√x = (4√2-4+4-2√2), √x+1/√x =2√2

ANSWER

Check whether 2 and -2 are zeroes of the polynomial x²-4

Posted by Jorawar Singh 8 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Lucky Raj 8 years, 7 months ago

x=x²-4 =2²-4 =4-4 =0 proved 2 is zeros of polynomial Again to prove -2 zeros of polynomial x=x²-4 =-2²-4 =4-4 =0 it's also proved -2 is zeros of the polynomial

ANSWER

The area of an isosceles triangle is 5000 m2 find it's perimeter .It is a right angled triangle

Posted by Mehak Gera 8 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Hans Raj 8 years, 7 months ago

let us consider a right Ld iscosceles triangle ABC rt Ld at B

AB = BC=x (Given as it is iscosceles triangle)

area = 1/2 x base x height

= 1/2 x x = 1/2 x² = 5000

x2=10000

x=100 m

AB = 100 m

BC = 100 m

AC2=AB2 + BC2

= (100)2 + (100)2

= 10000 + 10000

= 20000

AC = 100{tex} \sqrt{2}{/tex} m

thus perimeter = AB + BC +AC = 100 + 100 + 100 {tex} \sqrt{2}{/tex}

= 100(2 + {tex} \sqrt{2}{/tex}) m

ANSWER

Proove that root 2 is an irrational number.

Posted by Pushp Raj 8 years, 7 months ago

CBSE > Class 09 > Mathematics

1 answers

Mehak Gera 8 years, 7 months ago

Take under root of 2 and show it as the solution and the answer obtained is and irrational no. ....Hence proved

ANSWER

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