Home
Class 8
MATHS
In the above figure, / ABD =20^(@), / BD...


In the above figure, `/_ ABD =20^(@), /_ BDC =110^(@)` and `/_ DCA =30^(@)` . What is the value of `/_ BAC` ?

A

`30^(@)`

B

`60^(@)`

C

`90^(@)`

D

`120^(@)`

Text Solution

Verified by Experts

The correct Answer is:
b
(i) Sume of the angles in a quadrilateral is `360^(@)`.
(ii) Reflex `/_BDC =360^(@) -/_ BDC`.
(iii) `/_ BAC= 360^(@) - ( /_ ABD +` Reflex `/_BDC + /_ DCA )`.
(iv) Then find the required angle.
Promotional Banner

Topper's Solved these Questions

  • GEOMETRY

    PEARSON IIT JEE FOUNDATION|Exercise Level 2|20 Videos

  • GEOMETRY

    PEARSON IIT JEE FOUNDATION|Exercise Level 3|7 Videos

  • GEOMETRY

    PEARSON IIT JEE FOUNDATION|Exercise Essay type Question|3 Videos

  • Formulae

    PEARSON IIT JEE FOUNDATION|Exercise Level 3|7 Videos

  • INDICES

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION (Level 3)|7 Videos
PEARSON IIT JEE FOUNDATION-GEOMETRY -Level 1
  1. In the figure below (not to scale) , bar(PQ)||bar(TS), reflex / QRS=30...

    Text Solution

    |

  2. In a triangle ABC, if / A gt / B gt /C and the measures of /A , /B ...

    Text Solution

    |

  3. In the above figure, / ABD =20^(@), / BDC =110^(@) and / DCA =30^(@) ....

    Text Solution

    |

  4. In the figure below (not to scale), bar(MR )| bar(MP), bar(MQ) | bar(...

    Text Solution

    |

  5. <img src="https://d10lpgp6xz60nq.cloudfront.net/physicsimages/PSMATHVI...

    Text Solution

    |

  6. In the figure below, bar(BC)|| bar(EF),BC=EF and DF =AC. Which of the...

    Text Solution

    |

  7. In the above figure (not to scale), E and F are the mid points of AB a...

    Text Solution

    |

  8. What is the number of lines of symmetry for a parallelogram ?

    Text Solution

    |

  9. Given below are some figures. Choose the image of the given figure wit...

    Text Solution

    |

  10. In the given figure , PQ and RS are chords of length 10 cm each inters...

    Text Solution

    |

  11. In the above figure (not to scale), O is the centre of the circle. bar...

    Text Solution

    |

  12. In the above figure (not to scale), O is the centre of the circle. bar...

    Text Solution

    |

  13. In the above figure , overline(AB)andoverline(AC) are equal chords an...

    Text Solution

    |

  14. In the above figure, O is the centre of the circle and AB=CD. If / APB...

    Text Solution

    |

  15. In the above diagram (not to scale), AB=AC=. O is the centre of the ci...

    Text Solution

    |

  16. In the figure above (not to scale), AB=CD and /A =100^(@). / C =

    Text Solution

    |

  17. In the above figure, ABCD is a cyclic quadrilateral and /BCD =2 / BAD....

    Text Solution

    |

  18. In the below figure, one part of the line of symmetrcy is given. Recon...

    Text Solution

    |

  19. <img src="https://d10lpgp6xz60nq.cloudfront.net/physicsimages/PSMATHVI...

    Text Solution

    |

  20. <img src="https://d10lpgp6xz60nq.cloudfront.net/physicsimages/PSMATHVI...

    Text Solution

    |