1. Reviewing angles and polygons
3.01 Review for Test
Reviewing angles and polygons

2. Example 1
Find the obtuse angle.
A B
C D

3. Example 2 How many sides does an undecagon have? 11
How many sides does a dodecagon have? 12

4. Example 3
What is the sum of the interior angles for ALL quadrilaterals?
360 degrees

5. Example 4 Name the type of triangle that has NO congruent sides.
Scalene

6. Example 5
Which type of quadrilateral has parallel sides and all sides are congruent?
Square

7. Example 6
A square is a __________ quadrilateral.
regular

8. Example 7 What makes a polygon a regular polygon?
All side have to be congruent (equal).

9. Example 8 How many diagonals does an octagon have? Formula = n(n-3) 2
=8(8-3)
= 20

10. Example 9
How many sides does a hexagon have? 6

11. Example 10 Which two quadrilaterals HAVE to have right angles?
Square and Rectangle

12. Example 11 Name two quadrilaterals that ALWAYS have to be regular.
Square and Rhombus

13. Example 12
How many sets of parallel sides does a trapezoid have?
one

14. Example 13 Name the figure below. A) quadrilateral B) hexagon
C) octagon D) dodecagon

15. Example 14
How many line segments, points, and right angles does figure B have? B
4 line segments, 4 points, and 4 right angles.

16. Example 15
If you drew a rectangle, pentagon, and a nonagon, how many sides would you have drawn?
= 18 sides

17. Example 16
In a regular octagon, what types of interior angles do you have?
A) obtuse B) acute
C) right D) square