Question

in a triangle ABC with a,b,c are the sides of the triangle opposite to angles A,B and C respectively.if a=2b and A=3B then the triangle is

Answer 1

Sides of triangle
a, b  and c

Angles   =A, B and C

Thus

A + B + C = 180
according to question
a = 2b
A = 3B
Thus
4B + C = 180
Draw a perpendicular from A to D on BC
Thus 
the triangle is scalene traingle