A spinner for a board game consists of a cardboard circle with two plastic arrows anchored to its center. The arrows are congruent isosceles triangles connected at their bases, as shown. 2 isosceles triangles are connected at their bases. The length of the base is 2 centimeters. The total perimeter of each triangle is 10 centimeters. Heron's formula: Area = StartRoot s (s minus a) (s minus b) (s minus c) EndRoot The base of each triangle measures 2 centimeters and the perimeter of each triangle is 10 centimeters. What is the approximate total area of the plastic triangles on the spinner? 3.9 square centimeters 6.7 square centimeters 7.7 square centimeters 13.4 square centimeters