Answer:B is the answer
Step-by-step explanation:
TRUSt
The whole angle is 90 degrees and you have 45 so 90-45 = your answer :)
All triangles add up to 180 degrees so I don’t get the just of the question but there you go.
Perimeter is all sides added up.
Area is sometimes length times width with four sided figures like a rectangle or a square and for like triangles it is base times height.
