Home
Class 12
MATHS
If the sides of a triangle are 3, 5, 7, ...

If the sides of a triangle are 3, 5, 7, then

A

All its angles are acute

B

One angle is obtuse

C

Triangle is right angled

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC FUNCTIONS

    TARGET PUBLICATION|Exercise Evaluation Test|34 Videos

  • TRIGONOMETRIC FUNCTIONS

    TARGET PUBLICATION|Exercise Critical Thinking|88 Videos

  • THREE DIMENSIONAL GEOMETRY

    TARGET PUBLICATION|Exercise Evaluation Test|9 Videos

  • VECTORS

    TARGET PUBLICATION|Exercise Evaluation Test|18 Videos

Similar Questions

Explore conceptually related problems

If the lengths of the sides of a triangle are 3, 5, 7 , then its largest angle of the triangle is

If the sides of a triangle are 3,5 and 7, then find cos A

If the sides of a triangle are 13,7,8 then the greatest angle of the triangle is

IF the lengths of the side of triangle are 3,5A N D7, then the largest angle of the triangle is pi/2 (b) (5pi)/6 (c) (2pi)/3 (d) (3pi)/4

The lengths of the sides of a triangle are 3, 5 and 7. Show that the triangle is obtuse-angled.

If the coordinates of the mid-points of the sides of a triangle are (3,4),(4,6) and (5,7), find its vertices.

If the sides of a triangle are in the ratio 3 : 7 : 8 , then find R : r

TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS -Competitive Thinking
  1. If one side of a triangle is double the other, and the angles opposite...

    Text Solution

    |

  2. In triangleABC, (cos2A)/(a^(2))-(cos2B)/(b^(2))=

    Text Solution

    |

  3. If the sides of a triangle are 3, 5, 7, then

    Text Solution

    |

  4. If in a triangle ABC, 2cosA=sinBcosecC, then

    Text Solution

    |

  5. In triangleABC, if a^(2)+c^(2)-b^(2)=ac, then angleB=

    Text Solution

    |

  6. In A B C ,= if (a+b+c)(a-b+c)=3a c , then find /Bdot

    Text Solution

    |

  7. If, in a Delta ABC, a = 6cm , b = 8 cm, c = 10cm, then : sin 2A =

    Text Solution

    |

  8. If : a = 9, b = 8 and c = x satisfies 3 cos C = 2, then : x =

    Text Solution

    |

  9. In DeltaABC, a=2cm,b=3cmandc=4cm, then angle A is

    Text Solution

    |

  10. If the lengths of the sides of a triangle are 3, 5, 7, then its larges...

    Text Solution

    |

  11. The smallest angle of the DeltaABC, when a=7,b=4sqrt(3)andc=sqrt(13) i...

    Text Solution

    |

  12. In any DeltaABC, prove that ("sin(A-B)")/("sin(A+B)")=((a^(2)-b^(2))...

    Text Solution

    |

  13. In a !ABC , if 1/(b+c)+1/(c+a)=3/(a+b+c), then angleC=

    Text Solution

    |

  14. In a DeltaABC,angleC=(pi)/(3),"then "(3)/(a+b+c)-(1)/(a+c)=

    Text Solution

    |

  15. In triangle ABC, if A+C=2B, then (a+c)/(sqrt(a^(2)-ac+c^(2))) is equal...

    Text Solution

    |

  16. In triangleABC, a(b^(2)+c^(2))cosA+b(c^(2)+a^(2))cosB+c(a^(2)+b^(2))co...

    Text Solution

    |

  17. In a triangle ABC, if (b+c) / 11 = (c+a) / 12 = (a+b) / 13 then cosA...

    Text Solution

    |

  18. In any DeltaABC under usual notation, a(bcosC-c cosB)=

    Text Solution

    |

  19. If in a DeltaABC,a^(2)cos^(2)A-b^(2)-c^(2)=0, then

    Text Solution

    |

  20. The lengths of the sides of a triangle are alpha-beta, alpha+beta and ...

    Text Solution

    |