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In a Delta ABC if b+c=2a and /A=60^@ the...

In a `Delta ABC` if `b+c=2a` and `/_A=60^@` then `Delta ABC` is

A

equilateral

B

right angled

C

isosceles

D

scalene

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Verified by Experts

The correct Answer is:
A
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OBJECTIVE RD SHARMA-PROPERTIES OF TRIANGLES AND CIRCLES CONNECTED WITH THEM-Exercise
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  6. If I is the incentre of a !ABC , then IA:IB:IC is equal to

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  7. In a !ABC ,the HM of the ex-radii is equal to

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  8. In a !ABC if r(1):r(2):r(3)=2:4:6, then a:b:c =

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  9. If in a !ABC,angleA=pi//3 and AD is a median , then

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  10. In a !ABC cos^(2)A/2+cos^(2)B/2+cos^(2)C/2=

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  11. The base of a triangle is 80cm and one of the base angles is 60^(@).If...

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  12. In a !ABC if r(1)=16,r(2)=48 and r(3)=24, then its in-radius ,is

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  13. किसी triangleABC में सिद्ध करे कि ((a + b+ c)^(2))/(a^(2) + b^(2) +...

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  15. In a !ABC if a = 13, b =14 and c = 15, then reciprocals of r(1),r(2),r...

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  16. In a A B C , ifsinAa n dsinB are the roots of the equation c^2x^2-c(a...

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  19. In a Delta ABC, if b=20, c=21and sin A =3/5, then the value of a is

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  20. Let A, B and C are the angles of a plain triangle and tan(A/2)=1/3...

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