3. A regular polygon has an exterior angle of 7.5. What is the sum of all the interior angles?

4. Find the perimeter of a regular heptagon with consecutive vertices at A(-1,-2) and B(4, 10).
Perimeter of the heptagon is
___units..

Thanh and her crew are building a stage in the shape of a trapezoid for an upcoming festival. the lengths of the parallel sides of the trapezoid are 14 ft and 24 ft. the height of the trapezoid is 12 ft.what is the area of the stage? enter your answer in the box. ft²