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A protractor is a shape: semi-circle or full circle, that has degrees marked around the edge. Place the marked centre of the protractor on (for example) the corner of two lines forming a right-angle. The bottom line will be zero, while the vertical line will cross the 90 degrees mark of the protractor, so proving that a right-angle is 90 degrees.
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What are some ways to estimate the measure of an angle?
You can estimate angles by using right, acute, and obtuse, or just by simply using a protractor. A protractor isn't a person who is a pro at driving tractors, its a semi-circle shaped math tool. XD
How do you find interior and exterior angles of a polygon?
Use a protractor
How do you use a protractor for circles?
To use a protractor for circles you find the middle of the circle and you then put the dot on the hole then you measure
What do you use to measure a right angle?
If you absolutely needed to measure an angle to find out its degree measure, you would use a protractor.
How do measure an angle with a ruler?
You should use a special device for measuring angles - a protractor. With a ruler, it is much more complicated, but still possible: you can mark two points on the angle, one on each side; measure the distance from the vertext of the angle to those points; measure the distance between the points; then use the Law of Cosines to calculate the angle.
