If the angles of a triangle are in the ratio 1: 2: 2 triangle --
A
is isosceles
B
is obtuse
C
has one angle greater than 80 degree
D
is equilateral
Correct Answer: is isosceles
অনুপাতের whole = 1 + 2 + 2 = 5, The smallest angle হবে 15th of the sum of three angle,15×180 = 36. তাহলে অন্য দুটি angle হচ্ছে 2×36 = 72