Answered

1. Which formula can be used to find the sum of the interior angles of a polygon?
A. (n-2)180
B.180n - 1
C. 360/n
D.(180n - 360)/n

2. Is the following statement always, sometimes or never true? "A rhombus is a parallelogram."

Always
Sometimes
Never

3. A hexagon has three right angles. The remaining three angles are congruent. What are their measures?

135°
150°
120°
90°

4. The sum of the interior angles of a polygon is 1440°. How many sides does the polygon have?

14
8
10
12

5. The sum of the measures of four exterior angles of a pentagon is 282 degrees. What is the measure of the fifth exterior angle?

72°
108°
18°
78°

6. How many sides does a regular polygon have if each exterior angle measures 40°?

9
10
8
6

This is the unit 10 lesson 3 alternate quiz, if anyone has the rest of the answers for the test I'd greatly appreciate it!

Answer :

soniayeung1243oxuz6x
1. A

2. sometimes because parallelogram does not necessarily have 4 equal sides while rhombus does

3. their measures = ((6-2)*180-90*3)/3=150

4. no. of sides = 1440/180+2=10

5. the measure of the fifth exterior angle=360-282=78

6. let n be the no. of sides
    180-(n-2)*180/n=40
    (-180n+360)/n=-140
     -180n+360=-140n
     -40n=-360
     n=9
     so the no. of sides is 9

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