WILL AWARD BRAINLIEST. Pls answer all parts, if you answer incorrectly for points i will report.


Answer:
A) Area of the sidewalk = R^2 - r^2 - This can be the expression
Step-by-step explanation:
B) Answer = 3.14 * 40 = 125.6m^2
I think I did it right!
One the second part
idrk part a on the second one
Part b)
The scale factor from the first map to the second map can be determined by:
scale factor = (length of trail in first map) / (length of trail in second map)
8 cm / 6 cm = 1.33
The landmark on the first map is a triangle with side lengths of 3mm, 4mm, and 5mm.
3mm = 3 * 1.33 mm = 3.99mm
4mm = 4 * 1.33 mm = 5.32mm
5mm = 5 * 1.33 mm = 6.65mm