Angles of Polygons• HW• Study Links:3-8

• Mental math• 47 X 100,000=• 47 X 0.01=• 4.7 X 10,000=• 0.47 X100=• 0.047 X0.01 =

Today we will:• Investigate sum of angles in a polygon• Measure angles with a protractor• Find maximum, minimum and median in a data set

Activity• Survey:• Draw a triangle in your notebooks.• Measure all the angles .• Find the sum of the angles.• Inform your teacher about your record.• Cut the corners and arrange them in a straight line• Draw conclusion

Sum of all the angles in a triangle is • ??

Interior angles in a polygon

Review• Polygons/Not polygons• Concave/Convex• Guided Practice: math journal pg 85-90• Math Box pg 91• Math Masters

Closure• Polygons• Convex/Concave• Interior Angles• Reflex Angles• Sum of the angles in a triangle.• Sum of the angles in a quadrilateral