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In Delta ABC . P is an interior such tha...

In `Delta ABC `. P is an interior such that `angle PAB = 10^(@) , angle PBA = 20^(@) , angle PCA = 30^(@) , angle PAC = 40^(@) " then " Delta ABC ` is

A

isosceles

B

right angled

C

equilateral

D

obtuse angled

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The correct Answer is:
A
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AAKASH SERIES-PROPERTIES OF TRIANGLES-LECTURE SHEET EXERCISE - I ( Straight Objective Type Questions )
  1. If O is the point inside the triangle ABC such that lfloor OBC = A//2,...

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  2. In a triangle ABC, a similar triangle A'B'C' is inscribed so that B'C'...

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  3. In Delta ABC . P is an interior such that angle PAB = 10^(@) , angle P...

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  4. In Delta ABC , " if " angle C = 3 angle A, BC = 27 , and AB = 48. The...

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  5. In a triangle ABC, if A,B, C are in A.P and b:c =sqrt3:sqrt2, then

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  6. In Delta ABC, if cos A cos B+ sin A sin B sin C=1, then a:b:c=

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  7. In triangle ABC , if cot A , cot B , cot C are in A.P., then a^(2), b...

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  8. Which of the following does not exist ?

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  9. If the angles A, B and C of a triangle are in an arithmetic progressio...

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  10. If a, b and c represent the lengths of sides of a triangle, then the p...

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  11. In Delta ABC , angle A = 90^(@) and AD is an altitude . Complete the r...

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  12. ABC is a triangle with angle B greater than angle C . D and E are poin...

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  13. Two parallel chords of a circle of radius 2 are at a distance sqrt3 + ...

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  14. In triangle ABC, angle B = pi//3. " and " angle C = pi//4 . Let D div...

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  15. If the angles of a triangle are in the ration 4:1:1 then the ratio of ...

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  16. A triangle has base 10 and base angles are 50, 70If the perimeter of t...

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  17. The side of triangle ABC satisfy the relation a + b - c = 2 " and " 2a...

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  18. In Delta ABC , " if " a = 2, b = 3 " and " sin A = 2/3 . Then , cos C ...

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  19. O is the circumcentre of the triangle ABC and R(1), R(2), R(3) are th...

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  20. If b = 20 , c = 21 ," and " sin A = 3/5 then a =

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