Summer.

Triangles ABC and DEF are similar. If ∠ABC = 121°and ∠BCA = 35°, find the measure of angle FDE.

Find the standard equation of a circle with the center (0, 2) and a radius of 2 units.

If the sum of the measures of the interior angles of a n-sided polygon is 1,0800, then set up a mathematical model to find the number of sides of the polygon.

Find the equations of lines parallel to and perpendicular to the line 3x - 2y = -1 and passing through the point (3, -2)

A man who has phenylketonuria (metabolic genetic disorder) marries a woman who is heterozygous at that locus. What is the probability that their first child will have phenylketonuria? Plz help asap