Question

Two triangles ABC and DEF are similar. If the magnitude of their angles ACB, BAC, and ABC are in the ratio 1:4:7, then the measure of the angle DEF is? A. 75 B. 90 C. 120 D. 110

Answer 1

Answer:

120

Step-by-step explanation:

because the sum of a triangle is 180*

and according to question it have two triangle

now ,it calculate 180*+180*=360*

let the ratio be x

then

x+4x+7x=360*

=12x=360*

=x=360*/12

=x=30

according to DEF=30×4

=120*

HOPE IT HELPFUL FOR YOU