Question

Find the angles:
1.triangle abc
Angle a = 75 degree. find angle b and c.
2.triangle abc
Angle b=45 degree. Find angle a and c.

Answer 1

Sol. 1...)let's take the angle unknown be x.
So the eqn becomes is...
A +B +C =180
75+x+x =180
2x = 105
X = 52.5
Sol2...)by same process above
A +B +C =180
x +45+x=180
2x =135
x =67.5
So, in 1st question angle b & c =52.5
In 2nd question angle a & c=67.5