Answer:
D
Step-by-step explanation:
The problem with D is that 7 + 11 = 18. The rule is any two sides must exceed the third. D gives the shorter + the middle length = the longest length.
That can't work. All the others are fine.
It could be 1.85 meters for an adult bike.
The triangle BAC has two known measurements 30 and 90 so add those together and subtract by 180
30 + 90 = 120
180 - 120 = 60°
6(3)-1= 17
hope this helps
580 - 160 = 420
420/2 = 120
The answer is 120 pages