Intro To Angles

Do You Know? Complementary angles Vertex Protractor Supplementary Angles Reflex Angles Opposite angles Adjacent Angles Bisect Congruent Symmetry Vertex Protractor Rays Degrees Acute angle Obtuse angle Right angle Straight angle

Complementary Angles The two angles must measure 900 The missing angle measure is 300 600 A

The missing angle measure is 500 Complementary Angles The two angles must total 900 The missing angle measure is 500 400 A

The missing angle measure is 680 Complementary Angles The missing angle measure is 680 The two angles must total 900 A 220

The missing angle measure is 1300 Supplementary Angles The two angles must total 1800 The missing angle measure is 1300 A 500

The missing angle measure is 950 Supplementary Angles The missing angle measure is 950 The two angles must total 1800 A 850

The missing angle measure is 1100 The two angles must total 1800 The missing angle measure is 1100 700 A

Are These Angles Complementary? Are they adjacent angles? 230 670

Are These Angles Complementary? 670 Are they adjacent angles? 230

Are These Angles Adjacent? 3 2 1

Words You Should Know Congruent Figures are figures that have the same shape and size. Example: Symmetry is a line of reflection that divides a shape into two equal parts.

< a is adjacent to < b Adjacent Angles Adjacent angles share a common vertex, a common ray, and the interior of one does not overlap the interior of the other. < a is adjacent to < b a b

Bisect Bisect means to divide any figure into two equal parts. Example: 300 300

Survivors The class has been stranded on a island. To survive you must find a way for all group members to leave the island. Your only tools are a survival kit provided by your teacher.

How To Get Off The only way off the island it to follow the path created by a bisected right angle. The only problem is, for each group member, the path must be created in a different way. When you create a path off the Island write an explanation that explains the path. Make sure all group member understand and agree that this method will actually work. If all group members get off the island there will be a reward waiting. Work together and GOOD LUCK!

Creating Angle Bisectors Assignment For homework construct and bisect right angles. Each angle must be bisected using a different method. Write an paragraph for each angle identifying the tool(s) used and explaining how it was bisected. This assignment will be marked for points: Neatness and organization is a must No more that 3 methods per page C = 6 B = 8 A = 10

Example The tool I use to bisect this angle was a protractor. I bisected the angle by placing the protractor on the vertex and along one ray. I followed the inside measure from 00 to 450 , made a made and then connected this mark back to the vertex of the angle. 450 450