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What’s your angle?

This educational piece classifies angles based on their measurement ranges, covering right, acute, obtuse, and straight angles. A right angle, defined as 90 degrees, is often represented with a small square. An acute angle measures less than 90 degrees, while an obtuse angle is greater than 90 but less than 180 degrees. A straight angle is exactly 180 degrees, typically identified as a line. Visual aids like arcs and degree labels clarify each type’s exact measurement, enhancing comprehension of fundamental geometry concepts.

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What’s your angle?

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  1. What’s your angle? Classifying angles according to their range of measurement

  2. RIGHT ON! • When one ray meets another ray at a 90 degree angle • A right angle exists • A small square is used to designate the 90 degree measure

  3. Are you Trying to be CUTE? • When one ray meets another ray at an angle less than 90 degrees • An acute angle exists • An arc is usually drawn and labeled with a number and degree sign to indicate the exact measure • Since 59 is less than 90 the angle is acute 59◦

  4. A WIDE ANGLE LENS IS NICE! • When one ray meets another ray at an greater than 90 degree but less than 180 • An obtuse angle exists • An arc is usually drawn and labeled with a number and degree sign to indicate the exact measure • Since 137 is greaterthan 90 but less than 180 the angle is obtuse 137◦

  5. ON THE STRAIGHT AND NARROW! • When one ray meets another ray at twice a 90 (180) degree angle • A straight angle exists • Since a straight angle is also a line we don’t usually designate it’s measure • However occasionally it will be to rule out any misconception 180◦

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