Try this option ↓
Step-by-step explanation:
1) according to the condition two angles are equal, then two sides are equal also, it means
2) √x+4=√(5x+4);
3) the 'x' can be calculated if to solve this equation:
;



4) finally, answer: 9.
If it’s asking for Volume then the answer is 226.19.
If it’s surface area then it would be 207.35
(0,-9) could be a solution
What do you mean angle 6?