Question

pls Friends it's urgent​

Answer 1

By exterior angle property of the triangle

x + 56 =123

x = 123-56

x = 67.

please follow me

Answer 2

Answer:

x= 67°

Step-by-step explanation:

Given : A= 56°, B = x° , C = y

To find: x°

Solution : By exterior angle property

123° + y =180°

y = 180° - 123°

y = 57°

angle C = 57°

Now , sum of a ∆ABC is equal to 180°

angleA + angleB + angleC = 180°

56°+x°+57°=180°

x°+113°=180°

x°=180°-113°

x°=67°