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    • Posted by Manas Pratim Talukdar 5 years, 7 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Aryan Kumar 5 years, 7 months ago

    Let ABCD be a square. Let the diagonals AC and BD intersect each other at a point O. To prove that the diagonals of a square are equal and bisect each other at right angles, we have to prove AC = BD, OA = OC, OB = OD, and AOB = 90º. In ABC and DCB, AB = DC (Sides of a square are equal to each other) ABC = DCB (All interior angles are of 90) BC = CB (Common side) ABC = DCB (By SAS congruency) AC = DB (By CPCT) Hence, the diagonals of a square are equal in length. In AOB and COD, AOB = COD (Vertically opposite angles) ABO = CDO (Alternate interior angles) AB = CD (Sides of a square are always equal) AOB = COD (By AAS congruence rule) AO = CO and OB = OD (By CPCT) Hence, the diagonals of a square bisect each other. In  AOB and COB, As we had proved that diagonals bisect each other, therefore, AO = CO AB = CB (Sides of a square are equal) BO = BO (Common) AOB = COB (By SSS congruency) AOB = COB (By CPCT) However,AOB + COB = 180 (Linear pair) 2 AOB = 180º AOB = 90º Hence, the diagonals of a square bisect each other at right angles.

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    • Posted by Lahari Yellanki 5 years, 7 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Aryan Kumar 5 years, 7 months ago

    parallelogram=opposite sides equal +opposite angles equal Step-by-step explanation: we are given that ab=cd and bc=ad join ac ac=ac in Δabc andΔcda we have ab=cd bc=ad ac=ac Δabc ≅Δcda ⇒∠a=∠c  ∠b=∠d hence proved Read more on Brainly.in - https://brainly.in/question/8401070#readmore

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    • Posted by Sm Nandu 5 years, 7 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Anushka Chaudhary 5 years, 7 months ago

    Option c

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    • Posted by Kalwa Sushmitha 5 years, 7 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Md Anowar Haque 5 years, 7 months ago

    Option d

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    • Posted by Karan Arora 5 years, 7 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Aryan Kumar 5 years, 7 months ago

    Vertex B of ABC is located outside the circle with centre O. Side AB intersects chord CE at point E and side BC intersects chord AD at point D with the circle. We have to prove that ABC = [AOC – DOE] Join OA, OC, OE and OD. Now AOC = 2AEC [Angle subtended by an arc at the centre of the circle is twice the angle subtended by the same arc at any point in the alternate segment of the circle] AOC = AEC …(i) Similarly DOE = DCE ….(ii) Subtracting eq. (ii) from eq. (i), [AOC – DOE] = AEC – DCE ….(iii) Now AEC = ADC [Angles in same segment in circle] ….(iv) Also DCE = DAE [Angles in same segment in circle] ….(v) Using eq. (iv) and (v) in eq. (iii), [AOC – DOE] = DAE + ABD – DAE [AOC – DOE] = ABD Or [AOC – DOE] = ABC Hence proved.

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    • Posted by Manoj Kumar 5 years, 7 months ago

    CBSE > Class 09 > Mathematics
    • 0 answers
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    • Posted by Yalamalli Sivakumar 5 years, 7 months ago

    CBSE > Class 09 > Mathematics
    • 0 answers
    ANSWER

    • Posted by Avinash Jiddimani 5 years, 7 months ago

    CBSE > Class 09 > Mathematics
    • 2 answers

    Tanisha Chhikara 5 years, 7 months ago

    Two terms

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    Rohit Maurya 5 years, 7 months ago

    Which have two variable

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    • Posted by Ritik Singh 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Rohit Maurya 5 years, 7 months ago

    ^

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    • Posted by Aryan Kumar 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Rohit Maurya 5 years, 7 months ago

    .a(16a3-5)

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    • Posted by Aryan Kumar 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Rohit Maurya 5 years, 7 months ago

    =1/5

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    • Posted by Aryan Kumar 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Ã.P.W.B.Đ ⚡ 5 years, 7 months ago

    Lateral surface area of cone=pi×r×l =pi ×r×1 =pi×r.

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    • Posted by Aryan Kumar 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 2 answers

    Rohit Maurya 5 years, 7 months ago

    Sorry up is wrong. ... New ans is =22/7×31 (31+31)= 6035.08 ......

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    Rohit Maurya 5 years, 7 months ago

    Total surface area= 4/3×31(31+31) =6035.08.....

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    • Posted by Aryan Kumar 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Rohit Maurya 5 years, 7 months ago

    Ratio of volum = 4/3×22/7×2r :4/3×22/7×r =2:1.....

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    • Posted by Aryan Kumar 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Rohit Maurya 5 years, 7 months ago

    Ratio of these volume = ||r×r×h:||r×r×h =22/7×3×3×4:22/7×4×4×3= 3:4

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    • Posted by Aryan Kumar 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Aryan Kumar 5 years, 7 months ago

    Brainly.in What is your question? Secondary School Math 5 points A hemispherical tank is emptied by a pipe at the rate of 5 litres per minute how long will it take to half empty the tank if it is meter in diameter Ask for details Follow Report by Ankitkarn1177 02.01.2018 ankitkarn1177 what answer Log in to add a comment Answers Me · Beginner Know the answer? Add it here! santy2 santy2 Ace We first get the volume of the hemisphere. Formulae =2/3 pie r3 The radius =1/2m=0.5m Volume=2/3 × 0.5×0.5×0.5×3.142=0.2618m3 Convert to litres: 1 cubic meter=1000 litres 1000×0.2618=261.8litres It will be emptied to half:261.8/2=130.9m3 Rate:5litres per minute. Time taken =130.9/5=26.18minutes 26.18 minutes.

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    • Posted by Adithya Vardhan 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Rohit Maurya 5 years, 7 months ago

    Here, Am=1/2ac (:.m is mid point) Abm~= mbc (why) Mc=am (:.above prove ) Mb=mb (common ) \abm=\mba (:.mis the midpoint and busector of \abc) =by (sas) Then, \abm=\mcb ( by c.p.c.t ) So, Mb=mc& mb=am (:.am=bm) So, Am=bm=1/2ac...........

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    • Posted by Pramud Kakati 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 0 answers
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    • Posted by Ashu Mahto 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Pramud Kakati 5 years, 8 months ago

    1.0656666E13

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    • Posted by Zaheen Reyaz 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 0 answers
    ANSWER

    • Posted by Rohan Sirohi 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 2 answers

    Neha Verma 5 years, 7 months ago

    First correct urr.. question

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    Neha Verma 5 years, 8 months ago

    22

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    • Posted by Aryan Kumar 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Murari Sah 5 years, 8 months ago

    Given side of solid cube = 12cm Volume of big cube = A^3 = (12)^3= 1728cm^3. The cube cut into eight eqaul volume cubes. Volume of 8 cubes=1728cm^3 Volume of 1small cube=1728/8=216cm^3 Now, volume of small cube=(a)^3=216 a=6cm. Surface area of big cube (S1)=6A^2=6x12^2=864cm^2. Now surface area of small cube (S2)=6a^2=6x6^2=216cm^2. Now S1/S2=864/216=4/1=4:1

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    • Posted by Rajvi Kantaria 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Satyam King 5 years, 8 months ago

    4root6+ 3root6 + 12root10-8root10 4+3root6+12-8root10 7root6+4root10

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    • Posted by Sidharth Nakose 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Sachin Sharma 5 years, 7 months ago

    Please check your answer

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    • Posted by Sushma Pandey 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Shreeya Chauhan 5 years, 8 months ago

    3(y+x)=14 y+x=14-3 y+x=11

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    • Posted by Aryan Kumar 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Abdut Taiyeb Matcheswala 5 years, 8 months ago

    The diameter of moon is 1/4 of earth so the area of earth is 4x. For this reason ratio of earth and moon is 1:16. Because Moon is 1/4. Is equal to 4. And earth is four times of four so earth is equal to 4×4=16 so the ratio is 1:16. 1 is moon. 16 is earth

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    • Posted by Vanshi Ka 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 0 answers
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    • Posted by Vanshi Ka 5 years, 2 months ago

    CBSE > Class 09 > Mathematics
    • 2 answers

    Satyam King 5 years, 8 months ago

    you are gadha ho kya

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    Abdut Taiyeb Matcheswala 5 years, 8 months ago

    What is the meaning of this question

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    • Posted by Dheeraj Jaat 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 2 answers

    Abdut Taiyeb Matcheswala 5 years, 8 months ago

    . C.S.A=πrl. H=4 R=3 L=? Find L=L= √r square + h square L= √3 square + 4 square L= 9+16.=25 Because √3=9 √4=16 So L is 5. Because √5=25 Now. C.S.A. = πrl = 22/7×3×5 = 3.14×3×5 = 9.42×5 = 47.10 C.S.A of. Cone is 47.10

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    Yogita Ingle 5 years, 8 months ago

    Curved Surface Area = π r l
    = 3.14 × 4 × 3
    = 37.68 sq.cm

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    • Posted by Payal Adhikari 5 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Satyam King 5 years, 8 months ago

    gadhi

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