How to find the missing angle of this quadrilateral if the other angles are 108 degrees, 99 degrees, and 78 degrees?

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Mickey needs to cut pieces of ribbon that are each 1 meter long tie onto balloons. if he has 8 pieces of ribbon that are each 1 dekameter long. how many 1 meter pieces of ribbon can he cut

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?