5. Fill in each blank with always, sometimes, or never. a.) The corresponding angles of two parallel lines have measures that are equal. b.) A closed figure is simple. c.) The diameter of a circle is bigger than a radius of that circumference. right triangles. d.) Isosceles triangles are 6. (a) Determine each angle measure in the triangle. (b) Then state whether the triangle is acute, right, or obtuse AND (c) also state whether the triangle is scalene, isosceles, or equilateral. (x-30) (2x-120) C (4x+15)