Which of the following polygons is not a regular polygon?

What point is the projection of q on a) r b) s c) t

Beth divided 9 ounces of her granola recipe into 4 equal-sized amounts. she placed the amounts into individual bowls. the fraction 9/4 represents the number of ounces of granola in each bowl. which other number represents the amount of granola beth has in each bowl? (a) 1 1/4 (b) 2 1/4 (c) 1 3/4 (d) 3 3/4 i need !

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me