Answer:
351°
Step-by-step explanation:
-369° + 360° = -9°. This is in Quadrant IV. If you want a reference angle in Quadrant I, find the positive angle between 0 and 360° that has the same terminal point at does -9°. It is 360° - 9° = 351°
Answer:
the 2nd one lol
Step-by-step explanation:
Answer:
group to be studied
Step-by-step explanation:
Answer: (175*π)yd^2
Step-by-step explanation:
If we find the total area enclosed by the outer circle, the subtract the area enclosed by the inner circle, the we inevitably get the area between the two regions.
The radius of the outer circle is 15yd + 5yd, which is 20yd. Use the formula for the area of a circle, A = pi*r^2. Therefore, the area enclosed by the outer circle is:

Now, the radius of the inner circle was stated to be 15yd. Do the same thing. Plug it into the formula:

Subtract the two areas to find the shaded blue area. Hopefully this was intuitive by thinking of area as an enclosed region of space.
