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3 years ago

Please help I have been stuck on these two for two days now!!!

Mathematics

1 answer:

postnew [5]3 years ago

8 0

First of all you should demand your teachers stop teaching you algebra in geometry class.

Linear pairs (and this is the geometry part) are angles that add to 180 degrees, supplementary angles formed by two lines crossing.

3n + 21 + 2n + 34 = 180

5n + 55 = 180

5n = 125

n = 25

mEFG = 3n + 21 = 96 degrees

mCFH = 2n + 34 = 84 degrees

These are indeed supplements, adding to 180 degrees.

ACD is a right angle because it makes a linear pair along DF with another right angle.

mACB + mBCD = 90 degrees

mBCD = 90 - mACB = 90 - 68

mBCD = 22 degrees

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