Presentation is loading. Please wait.

Presentation is loading. Please wait.

Chapter 24 Polygons.

Similar presentations


Presentation on theme: "Chapter 24 Polygons."— Presentation transcript:

1 Chapter 24 Polygons

2 Learning Outcomes Find missing interior angles in a polygon
Find missing exterior angles in a polygon Find missing interior angles in a regular polygon Find missing exterior angles in a regular polygon Tessellate shapes

3 Polygons All shapes with straight sides 3-sided Triangle
4-sided Quadrilateral 5-sided Pentagon 6-sided Hexagon 7-sided Heptagon 8-sided Octagon 9-sided Nonagon 10-sided Decagon

4 Interior Angles Remember a triangle adds to 180o!

5 Sum of Interior Angles Sum of Interior Angles = Number of
Triangles × 180 Sum of Interior Angles = (n – 2)× where n = number of sides

6 Exterior Angles Remember a straight line adds to 180o!

7 Sum of Exterior Angles Sum of ALL exterior angles = 360o

8 Regular Polygons Regular polygon has equal sides and equal angles
1 exterior angle = 360 ÷ number of sides 1 interior angle = 180 – exterior angle

9 Examples Find the exterior and interior angle in a regular heptagon
Calculate the number of sides in a polygon if its exterior angle is 24o Calculate the number of sides in a polygon if its interior angle is 171o

10 Tessellations Tessellating means tiling


Download ppt "Chapter 24 Polygons."

Similar presentations


Ads by Google