Answer:
What is it abt area? angles?
Answer: No question but I'll say what I know to try to answer your question. Triangles are 3 sided shapes with at least one 45 degree angle. There are types of triangles such as isosceles, scalene, and equilateral triangles.
2. -16
6. 23
7. -40
8. -17
9. 41
10. -58