1.4 Ms. Verdino. An angle is formed by two rays with the same endpoint. The rays are the sides of the angle. The endpoint is the vertex of the angle.

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Presentation transcript:

1.4 Ms. Verdino

An angle is formed by two rays with the same endpoint. The rays are the sides of the angle. The endpoint is the vertex of the angle. The interior of an angle is the region containing all of the points between the two sides of the angle. The exterior of an angle is the region containing all of the points outside of the angle.

Ways to name an angle: Vertex: Points on each ray: A number: Your turn! Vertex: Points on each ray: A number:

Consider OB and a point A on one side of OB. Every ray of the form OA can be paired one to one with a real number from

The measure of  COD is the absolute value of the difference of the Real numbers paired with OC and OD.

 MLN  NLP  NLQ  OLP

Angles with the same measure are congruent angles.

If point B is in the interior of  AOC, then m  AOB + m  BOC = m  AOC

If m  FHI=142, what are m  FHG and m  GHI?

 JKL is a right angle. What are m  JKM and m  MKL?