geometry hw need help please thanks

1. the base angles of an isosceles trapezoid are each 60 degrees and one of the diagonals bisects the base angle. if the median is 15 inches long, find the area of the trapezoid

2. A circles has its center ate (2, -3). the equation tangent to the circle is

4y-3x=7. Find the equation of the circle

3. The altitude to the hypotenuse of a right triangle is 8 and the median to the hypotenuse is 10. find the perimeter of the triangle and the area of the part of the circumscribed circle which lies outside the triangle