How to find all angles & all sides in a triangle

HYP = 17

OPP = 12
ADJ = ? 

Ө = ?

Proof

S = O/H    C =A/H    T = O/A

To calculate the angle we can use:

SinӨ= OPP/HYP

SinӨ= 12/17

SinӨ= 0.7

To change the angle to degrees I am going to use:

Sin - 1 0.7 = 44.4°

All angles in a triangle must equal to 180°

Ө1 + Ө2 + Ө3 = 180°

Ө1 = 44.4°

Ө2 = ?

Ө3 = 90°

44.4° + ? + 90° = 180

44.4° + 45.6° + 90° = 180

Ө2 = 45.6°