Please help this is due today Given parallelogram ABCD determine the missing information

Don’t answer with one answer, blank or ridiculous answer please this is serious

At a point on the ground 50 meters from the foot of a tree, the angle of elevation to the tree is 48°. find the height of the tree to the nearest meter.

How can we find the measure of an exterior angle if we know the measurement of an interior angle

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle