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In the adjoining figure D is the midpoin...

In the adjoining figure D is the midpoint of BC of a `DeltaABC, DM and DN` are the perpendiculars on AB and AC respectively and `DM = DN`, then the `DeltaABC` is :

A

right angled

B

isosceles

C

equilateral

D

scalene

Text Solution

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The correct Answer is:
B
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ARIHANT SSC-GEOMETRY-INTRODUCTORY EXERCISE - 12.2
  1. In the given diagram of DeltaABC, angleB=80^(@), angleC=30^(@) BF and ...

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  2. In an equilateral triangle, the incentre, circumcentre, orthocentre an...

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  3. In the adjoining figure D is the midpoint of BC of a DeltaABC, DM and ...

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  4. In the adjoning figure of DeltaABC, AD is the perpendicular bisector o...

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  5. Triangle ABC is such that AB=9 cm, BC = 6cm, AC = 7.5 cm. Triangle DE...

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  6. In DeltaABC, AB=5cm, AC=7cm. If AD is the angle bisector of angleA The...

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  7. In a DeltaABC, D is the mid - point of BC and E is mid - point of AD, ...

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  8. In a DeltaABC, AB=AC and AD|BC, then:

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  9. The difference between altitude and base of a right angled triangle is...

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  10. If AB, BC and AC be the three sides of a triangle ABC, then which one ...

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  11. In the triangle ABC, side BC is produced to D. angleACD=100^(@) if BC ...

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  12. In the adjoining figure D, E and F are the mid - points of the sides B...

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  13. In the adjoining figure angleBAC=60^(@) and BC = a, AC = b and AB = c,...

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  14. In the adjoining figure of DeltaABC, angleBCA=120^(@) and AB = c, BC =...

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  15. In a right angled DeltaABC, angleC=90^(@) and CD is the perpendicular ...

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  16. If the medians of a triangle are equal, then the triangle is

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  17. The incentre of a triangle is determined by the :

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  18. The circumcentre of a triangle is determined by the :

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  19. The point of intersection of the angle bisectors of a triangle is :

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  20. The diagonal of the square field measures 50m. The area of square fiel...

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