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

Example 1 Find the obtuse angle. A B C D

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

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

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

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

Example 6 A square is a __________ quadrilateral. regular

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

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

Example 9 How many sides does a hexagon have? 6

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

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

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

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

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

Example 15 If you drew a rectangle, pentagon, and a nonagon, how many sides would you have drawn? 4 + 5 + 9 = 18 sides

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