Geometry 5 Level 1. Interior angles in a triangle.
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Transcript of Geometry 5 Level 1. Interior angles in a triangle.
![Page 1: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/1.jpg)
Geometry 5
Level 1
![Page 2: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/2.jpg)
Interior angles in a triangle
![Page 3: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/3.jpg)
Interior angles in a quadrilateral
![Page 4: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/4.jpg)
Interior angles in a pentagon
![Page 5: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/5.jpg)
Interior angles in a pentagon
![Page 6: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/6.jpg)
Interior angles in a hexagon
![Page 7: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/7.jpg)
General rule
Sum of interior angles = (number of sides - 2) x 180
![Page 8: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/8.jpg)
Exterior angles = 360 degrees
![Page 9: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/9.jpg)
Equilateral triangle
![Page 10: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/10.jpg)
Equilateral triangle. All angles are the same.
![Page 11: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/11.jpg)
Exterior angles = 360 degrees
120
120
120
60
60
60
![Page 12: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/12.jpg)
Angles on a line sum to 180
120
120
120
60
60
60
![Page 13: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/13.jpg)
A square is a regular quadrilateral
90
90
90
90
![Page 14: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/14.jpg)
Interior angles are all 90
90
90
90
90
![Page 15: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/15.jpg)
Exterior angles are all 90 and add up to 360
90
90
90
90
![Page 16: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/16.jpg)
Regular pentagon
![Page 17: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/17.jpg)
Exterior angles add up to 360
![Page 18: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/18.jpg)
Exterior angles add up to 360
![Page 19: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/19.jpg)
Exterior angles add up to 360
![Page 20: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/20.jpg)
Interior angles are on a line with exterior angles
![Page 21: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/21.jpg)
Interior angles are on a line with exterior angles
![Page 22: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/22.jpg)
Find the interior and exterior angles of a regular hexagon.
![Page 23: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/23.jpg)
Exterior angles.
![Page 24: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/24.jpg)
Interior angles.
![Page 25: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/25.jpg)
How many sides does a regular polygon have if the
exterior angles are 45 degrees?
![Page 26: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/26.jpg)
How many sides does a regular polygon have if the
exterior angles are 45 degrees?
![Page 27: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/27.jpg)
How many sides does a regular polygon have if the
interior angles are 144 degrees?
![Page 28: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/28.jpg)
How many sides does a regular polygon have if the
interior angles are 144 degrees?
Exterior angle
Number of sides
![Page 29: Geometry 5 Level 1. Interior angles in a triangle.](https://reader035.fdocuments.in/reader035/viewer/2022062221/56649cf65503460f949c5a30/html5/thumbnails/29.jpg)
Find all the angles