The answer is 45°
By determining the angles of triangle ACB (A=30°, B=45°, C=105° (total of 180°)) and knowing that angle 1 correlates to angle 4 ((1)°=(4)°), we can find angle 1, which is 45°, equal to angle 4.
Answer:
1)PT = 21 units
2)Option D
3)Option A
4)∠EFG = 2(24) +15 = 63 degrees
∠GFH= 4(24) +21 = 117 degrees
5) circumference = 21.98 cm
Step-by-step explanation:
1) As the T is midpoint, PT is equal to TQ in magnitude.
Thus, 

x=5.
Thus, PT = 4(5) + 1 = 21
2) The planes XTS and VRS intersect in the line SW, and the intersection is perpendicular.
3)For a line to be defined, it must have 2 points, start and end.
The option A) is not defined properly, so incorrect
4)As the angles are linear pair, their sum is 180 degrees.
Thus, 

n = 
∠EFG = 2(24) +15 = 63 degrees
∠GFH= 4(24) +21 = 117 degrees
5) diameter = 7 cm
radius = 3.5 cm
circumference = 
Formula for speed = distance/ time
S = 7/.9 = 7.77 miles per hour or 8 mph if you round up.