638 divided by 11= 58. 58x9=522
X = 2i, -2i (I’m sorry if it does come back as wrong but it’s the only answer I got)
Answer:
Acute Angled Triangle.
Right-Angled Triangle.
Obtuse Angled Triangle
Step-by-step explanation:
a right angle would be 90° angle
obtuse would be over 90°
acute would be smaller than 90°
hope this helps!