You are building a hexagonal patio with sides of 10 ft. (Note: For help, see Figure 12-9 on page 163.) You are flooring it with 4" of concrete. a. What is the perimeter of the patio? b. What is the measure of the interior angle? c. How many equilateral triangles are formed have their vertices at the center of the hexagon? d. What is the height of one of the equilateral triangles? (Note: For help, see section 2.2) e. What is the area of the hexagon? f. How many yard (cubic yards) of concrete are needed? For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).