A reference angle is an angle between 0° and 90° formed between the terminal ray of an angle and x-axis. Rule: When the ray is in the:
Click on the blue points and drag them to change the figure. Why are the reference angles for angles between 90° and 180° degrees negative? |
Manipulative 1 - Reference Angle Created with GeoGebra. |
# | A | B | C | D |
E | F | G | H | I |
J | K | L | M | N |
O | P | Q | R | S |
T | U | V | W | X |
Y | Z |
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