Using a protractor to measure angles

(For assistance see www.mathopenref.com/constmeasureangle.html)

1. | The figure below is an irregular triangle. | |

(a) | Measure the 3 internal angles with a protractor and add them up. | |

(b) | Challenge Problem: Determine the sum of the interior angles of a triangle using knowledge about the properties of triangles, and verify your measurements. (Hints at: www.mathopenref.com/triangleinternalangles.html) |

(C) Copyright John Page 2007