1)Use the tool to define the following academic vocabulary. a) sum b) equation c) polygon 2) Use the tool to write an equation to represent the given situation. 3) Simplify and solve the equation to find the value of x. Use the and tool to show and explain your work. 4) the 4 angle measures of the polygon.
3x+2x+5+2x+10+2x-15=360 9x=360 x=40 Therefore, the angle measures are 120, 85, 90 and 65.