Question

find the value of the unknown angle x following cases​

Answer 1

Answer:

Step-by-step explanation:

Concept Used: Exterior angle property of triangle

c. 40+50=x

   x=90

d. 60+60=x

    x=120

Answer 2

Answer:

c.

x=90°

d.

x=120

Step-by-step explanation:

c.

let unknown angle in triangle is S

so 40+50+S=180

so S=90 then x must be 90

d.

Let unknown angle in triangle is S

so S+60+60=180

So S=60

then S+X=180

60+X=180

X=120