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
Since the triangles make up a spinner, the triangles are isosceles. The base is 2 cm and the perimeter is 10 cm. The measure of the two legs can be determined from 2 + 2x = 10 Where is the length of the leg Solving for x x = 4 The area an isosceles is calculated using [tex]A = \frac{1}{2} b^{2} \sqrt{ \frac{ b^{2} }{ x^{2} }- \frac{1}{4} } [/tex] where b is the length of the base Substitute the values and multiply with the number of triangles in the spinner
