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Student Instructions
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.
9th Grade,
8th Grade,
Math
Students will edit this template:
Teacher Notes (not visible to students)
3x+2x+5+2x+10+2x-15=360 9x=360 x=40 Therefore, the angle measures are 120, 85, 90 and 65.
