Determine side w in △WBT where b = 3.6, ⦟B = 5°, and ⦟W = 85°

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.

I’m confused on how to work the pie charts

Abcd is reflected across the x- axis, then rotated 90 clockwise about the orgin, and finally reflected across the line y= x to form a’ b’ c’ .