Answer:
207°
Step-by-step explanation:
Combine the fractions by finding a common denominator.
10r+9/r(r+3)
The interior angles of a quadrilateral shape add up to 360 so 116+93+45+x = 360 with x equaling 106
Check the picture below, you can pretty much count the units off the grid.
recall that the area of a triangle is A = (1/2)bh.