Step-by-step explanation:
first of all, your teacher wrote nonsense in the answer options : an area is always given in squared units. never in cubed units (which would be volume).
the area is : 1/2 × perimeter × apothem
the perimeter is simply 12 × 5 = 60 meters.
apothem = (a/2)×cot(pi/12) = 5/2 × cot(pi/12) =
= 9.330127019... meters
so the area is
1/2 × 60 × 9.330127019... = 279.9038106... m²
therefore, the third answer option is correct (although it is m², and not m³).
by the way, you have question 3 wrong. I answered this with the correct apothem calculation in the explanation for question 4.
Answer: it’s B
your welcome
Step-by-step explanation:
Hello there,
3 1/4 - 1 7/8 as a mixed number
Answer: 
A rotation doesn't change the length of anything.
The length of the rotated line segment would be the same as the original line segment.
Because both Y values are the same, you just need to calculate the length of the X values.
5 to 0 = 5
0 to -6 = 6
Total length = 5 +6 = 11 units long.
