Question

In∆ABC,<ACD=105° be an exterior angle of it.If <A=<B=3:4,find <A​

Answer 1

Step-by-step explanation:

As Exterior angle =105

Angle C=180- 105=75

Suppose

Angle A =3x

Angle B =4x

now 3x+4x=180-75=105

x=15

Angle A=75

all angles are in degree unit.

Answer 2

Answer:

45

Step-by-step explanation:

given a: b is 3:4

4a-3b is 0

ext ang is sum of opp int angls

a+b is 105

a is 45

b is 60