Question

1. how much more would you need to swing this door completely open (i.e. the door laying against the wall) if it was already open 68 degrees?

68 degrees
112 degrees
22 degrees
102 degrees

Explanation:

Step1: Know full - open angle

A door laying against the wall is open at 180 degrees.

Step2: Calculate remaining angle

Subtract the current open angle from 180 degrees. Let the remaining angle be $\theta$. Then $\theta=180 - 68$.
$180-68 = 112$

Answer:

112 degrees