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OpenStudy (mlgpro):
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OpenStudy (littlebird):
To find angle ECH, you need to break it up into a bunch of smaller angles and add them together. Angle ECH can be broken into 3 different angles- ECF, FCG, and GCH Angle GCH is a given- 19 degrees Angle FCG is also given since it is a right angle- 90 degrees Angle ECH is a portion of a right angle. the other portion is 33 degrees. I other words, ECH is 90-33=57 ECH is each of the three angles added together.
OpenStudy (wolf1728):
Angle ECH = 180° +19° -33°
OpenStudy (littlebird):
i made a typo in that explantion towards the end. i'll fix it
OpenStudy (littlebird):
EC"F " is 90-33
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