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Reference Angles
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The Reference Angle y The reference angle is the angle made in the triangle closest to the origin ’ x ’
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Find the reference angle
y Find the reference angle for 288 Draw 288 angle Draw triangle back to x axis Find reference angle x ’ ’ is what is left over from 360 360 – 288 = ’ = 72
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Find the reference angle
y Find the reference angle for 98 Draw 98 angle Draw triangle back to x axis Find reference angle ’ x ’ is what is left over from 180 180 – 98 = ’ = 82
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Find the reference angle
y Find the reference angle for -55 Draw -55 angle Draw triangle back to x axis Find reference angle x ’ ’ is what is the same as measured from zero but the positive angle |-55| = ’ = 55
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