INTERIOR ANGLE MEASURE
The total number of degrees inside a figure = 180(n − 2), where n = number of sides.Triangles—Area and Perimeter
The perimeter of a triangle is the sum of the lengths of its sides.The perimeter of the triangle in the figure above is 3 + 4 + 6 = 13If two sides of a triangle are 5 and 8, which of the following could be the length of its third side? (circle all that are possible)3 5 9 13 15vi.