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Assertion (A) : The angle between equal ...

Assertion (A) : The angle between equal sides of an isosceles triangles is ` 60 ^(@) ` then r: R= 1: 2
Reason (R ) : Every isosceles triangles is equilateral triangle

A

A is true , R is true and R is correct explanation of A

B

A is true , R is true and R is not correct explanation of A

C

A is true R is false

D

A is false , R is true

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-PROPERTIES OF TRIANGLES-EXERCISE - II
  1. In Delta ABC , with usual notation observe the two statements given ...

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  2. In Delta ABC Macth of following

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  3. Assertion (A) : The angle between equal sides of an isosceles triangle...

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  4. Assertion (A) : In Delta ABC a,b, c denotes lengths of the sides an...

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  5. Statement -I : In Delta ABC , b cos ^(2) "" ( C)/(2) + c cos ^(2) ""...

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  6. In a Delta ABC , ir r1 = 2r2 = 3r3 " then " (a)/(b) + ( b)/( c ) + (...

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  7. If in a Delta ABC, r1= 2r2= 3r3, then the perimeter of the triangle ...

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  8. If in a Delta ABC , r1 =2r2=3r3, then b: c=

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  9. If cot ""(A)/(2) = 30 , Cot "" (B)/(2) = 50 , Cot "" ( C)/(2) = 70...

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  10. A tower, of x metres high, has a flagstaff at its top. The tower and t...

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  11. A ladder of 20 mt long reaches a point 20 mt below the top of a flag s...

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  12. The angle of elevation of the toop point P of the vertical tower PQ of...

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  13. A lamp post is sittuated at the middle point M of the side AC of a tri...

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  14. A flag staff stands vertically on a pillar. The height of the flag sta...

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  15. A tower subtends angles alpha, 2alpha, 3alpha at A,B and C all lyin...

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  16. The upper (3)/(4) the portion of a vertical pole subtends an angle...

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  17. A vertical pole subtends an angle Tan ^(-1) (( 1)/(2)) at a point ...

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  18. The sides of a right angled trinagles are in A.P., then they are in th...

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  19. The angle of elevation of the top of the tower is 45^(@) on walking up...

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  20. The angle of elevation of a tower from two point which are distance h...

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