How do I find a missing side of an obtuse triangle when two angles and one side are given? Angle A = 45
Angle B = 30
Side a = 12 cm

Step-by-step explanation:

I think you mean missing angle.

This can be solved by using the triangle sum theorem. It states that the 3 angles of a triangle always add up to 180°. We just have to subtract the other 2 angles from 180°. 180 - (45 + 30) = 180 - 75 = 105.

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.

207/8 is the right