2.7 and 3.7 “I can use benchmark angles to estimate the measure of angles, and use a tool to measure and draw angles.” “I can understand that the measure.

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Presentation transcript:

2.7 and 3.7 “I can use benchmark angles to estimate the measure of angles, and use a tool to measure and draw angles.” “I can understand that the measure of an angle is determined by the degree of rotation of an angle side rather than the length of either side.”

Why is this important? Building a bike ramp Cutting paper What jobs deal with angles? What type of things do you deal with that involve measuring angles.

Vocabulary Benchmark angles - an angle that is _______ to work with like ______ degrees or 45 degrees. 120 90 45

Protractor A tool used to measure the ______ of an angle.

Using a PROTRACTOR Rules: Place the centerline at the bottom of the protractor on the __________ of the angle. Then line up one ray of the angle with the ____________ of the protractor. Determine which measurement is correct by identifying the ______ of angle. OR Where ever the ray crosses through the zero degree mark that is the scale that you will use.

Measuring an Angle

Measure

Drawing an angle Rules: With the straight edge of your protractor draw a ray. Place the center of the protractor on the endpoint of the ray. Place a mark above the protractor at the given mark.

Draw a 130 degree angle Draw Below:

What did we learn today? List: