MCAS 2002, 8th Grade Math, Questions 29 to 32
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Question #29 (Open-Response Question)
Molly formed three polygons -- a triangle, a rectangle, and a pentagon -- with
string. She calculated the sum of the measures of the interior angles for each
polygon and entered her data in the chart shown below.
a. What is the sum of the measures of the interior angles of a hexagon?
b. What is the sum of the measures of the interior angles of an octagon?
c. How many sides does an unnamed polygon have if the sum of the measures
of the interior angles is 2340°?
d. Explain how you would find the sum of the measures of the interior angles
of an n-sided polygon.
Question #30
The Venn diagram below shows Leila’s graduating classes from middle school,
high school, and college.
How many students graduated together from both Leila’s middle school and
high school?
A. 133
B. 132
C. 131
D. 130
Question #31
The chart shows the area of the eight largest counties in Massachusetts.
What is the median area, to the nearest square mile, of the 8 largest counties in
Massachusetts?
A. 661 square miles
B. 682 square miles
C. 702 square miles
D. 792 square miles
Question #32
What value of x makes the equation below true?
3x + 2(x - 5) = 50
A. 8
B. 9
C. 11
D. 12
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