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If x, y gt 0, then prove that the triang...

If x, `y gt 0`, then prove that the triangle whose sides are given by `3x + 4y, 4x + 3y, and 5x + 5y` units is obtuse angled.

A

right angled

B

obtuse angled

C

acute angled

D

none of these

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The correct Answer is:
B
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ML KHANNA-PROPERTIES OF TRIANGLES -Problem Set (2)(MULTIPLE CHOICE QUESTIONS)
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  7. If cos A= (sinB)/(2 sinC), " then " Delta ABC is

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  8. In a triangle ABC, (asinB+bsinA)/(sqrt(sinAsinB))=4, angleC=pi/3 " the...

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  9. In a triangle, the lengths of the two larger sides are 10 and 9, re...

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  10. With usual notations, if in a triangle ABC (b+c)/(11) = (c+a)/(12) = ...

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  11. In a triangle ABC, a^4 +b^4 +c^4 = 2(a^2 +c^2)b^2 then the angle B is

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  12. In a triangle ABC ,a^2 cos^2 A=b^2+c^2, then

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  13. If in a triangle sin^4 A+sin^4 B + sin^4 C = sin^2 B sin^2 C+2 sin^2 C...

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  14. If A=60^@, " then " b/(c+a)+c/(a+b) =

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  15. The sides of a triangle are three consecutive natural numbers and its ...

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  16. If D id the mid-point of the side BC of a triangle ABC and AD is perpe...

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  17. Prove that ((a+b+c)(b+c-a)(c+a-b)(a+b-c))/(4b^2c^2)=sin^2A

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  18. Let 'l' is the length of median from the vertex A to the side BC of a ...

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  19. If a triangle ABC, D is the mid point of side BC and angleADB =theta "...

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