Answer:
21
Step-by-step explanation:
because you rupedid lol
Then a is Half of 45 wich is 22.5 I believe.
The 3rd answer, is correct.
Answer:3x+6=2x+21 base angle of isosceles triangle
3x-2x=21-6
X=15
<J=3×15+6=51
<k=2×15+21=51
,<I=180-51-51=78
Step-by-step explanation: