Algebra! need !
~a glass prism on a chandelier is 75 millimeters long. a base of the prism is an equilateral triangle with side lengtsh of 9 millimeters and a height of about 7.8 millimeters. what is the approximate surface area of the prism?

To find out a glass prism's surface are you should first find the, base's are. Since the base is triangle, it's are formula is :  (which h is height and b is base length).  since there are two triangle's their total area will be 70.2 To find the remaining surface's are multiply the perimeter of the base with the length.  then sum the total surface : 70,2 + 2025 = 2095,2