The value of 
.
The value of is 150°. ✅
We know that,
➡ 81° + 
= 180°
➡ = 180° -81°
➡ = 99°
Since an exterior angle of a triangle is equal to the sum of the two opposite interior angles, we have
= + 51°
Substituting the value of ''" in the above equation,
➪ = 99° + 51°
➪ = 150°
<u>Note</u>:-
Kindly refer to the attached file.
A (b-c) = d
b-c = d/a
-c = (d/a) - b
-c = (d-ab) /a
c = (ab-d)/a
Next, you are going to use the "keep, change, change" method. If you don't know what it means you are basically going to keep the first number the same, change the sign to subtraction, and finally change the negative number into a positive number.
13+-3
13-3
10
You are still getting the same results even if you didn't use this method.
