Question

ab =3:5 and cb= 2:1 find largest angle option
A 130
B 100
C 80
D 110
E 136​

Answer 1

Answer:

a:b:c = 3: 5: 10

now let the common ratio = x

a= 3x , b= 5x , c= 10x

a° + b° + c° = 180° ( supplementary angles)

3x + 5x + 10x = 180°

18x = 180°

x = 10°

so the largest angle is c = 10 × 10

100°( B)