∠1 + ∠3 + 90° = 180°
∠1 + ∠3 = 90°
∠3 = ∠4 (vertically opposite angles)
∠1 + ∠4 = 90°
Therefore, the answer is ∠1 + ∠4
Answer:

Step-by-step explanation:
Formula for the perimeter of a rectangle: 
Answer:
2
Step-by-step explanation:
He made 1 full one and the other contained 5
A.) $15 would seem like it would be right
The perimeter is 10 try to draw these points on the graph and count the distance between each or you can just look at the coordinates and find the distance and then add length and width