Best Answer

Easy, first you must assign a variable to the angle you are finding, x.

Then, if the angle is on a straight line then the total will be 180.

180

O

You should have one angle measument given, such as

An angle with x degrees and one with 72 lie on a straight line.

Then, all it is is x+72=180 which can be rewritten as 180-72=x so x must equal 108!

Same goes for to angles in a right angle, but replacing the 180 with 90.

Now if you are finding a missing angle measure in triangles all you do is add the given measures and subtract from 180 to get the missing measur, x.

Q: How do you solve angle measures using algebra?

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With trigonometry by using the cosine rule

With trigonometry by using the cosine rule

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73.5+16.5 = 90 degrees which is a complementary angle