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If there is a line sticking out of another line, subtract from 180 degrees.

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If the transversal is perpendicular, then divide 360 by 4. That will make 90 degrees.

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If it's perpendicular they're all 90 degrees . If not add the measurement  to the other (unknown) angle
-Josephine

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you can use a protractor for one if you get the correct answer do the same for the rest 7

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you can use a protractor for one if you get the correct answer do the same for the rest 7

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~ Sariah

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If it's perpendicular then they're all the same

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I you know one angle you find out one angle and then you can understand the rest
Sariah

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If the transversal is perpendicular then they are 90 degrees if it's not, then take the measurement that you know and add it to the bigger angle and it should equal 180 degrees

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If you have one angle you can figure out the correspondent angle which give you another angle. 1 and 7 is the same, 8 and 2 are the same , 4 and 6 are the same and 5 and 3 is the same. For example if 7 equals 60 degrees than 1  would be 60 degrees. All of the angles add up to 720 degrees.

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I guess.

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You know the first angle and for the rest you can use a protractor
-Taylor

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90 degrees is in a perpendicular line

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If you know one of the angles and it is 60°, you can subtract 180° by 60° which would give you the answer for the other angles (120°) because the angles in a straight line  are supposed to add up to 180°.

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first you label all angles 1-8. if you can find out how angle 1 and 2 add up to 180 then you'll understand the rest
- Daniella

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Measure the first angle you have using a protractor. Then do it again ^ - ^

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if you can find one of the angles, you can easily find the others  by using a protractor.
Jade

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If the transversal is perpendicular each angle would be 90°, if the transversal is not perpendicular you would take the angle you do know, for instance if you know one angle is 45° the angle beside it would be 135° because the angles beside each other must have a sum of 180° (as they are essentially a straight angle)

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If the transversal is perpendicular each angle would be 90°, if the transversal is not perpendicular you would take the angle you do know, for instance if you know one angle is 45° the angle beside it would be 135° because the angles beside each other must have a sum of 180° (as they are essentially a straight angle)

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You can use a protractor to measure the remaining angles that you don't know. Also usually, if you have one angle you can find the rest. 

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You can use a protractor to measure the remaining angles that you don't know. Also usually, if you have one angle you can find the rest. 

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-Mirabelle

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You need to find the supplement of the angle you know, the other angles should be the same

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Both intersections would have the same angles, so you only need to find the angles for 4 of them. In each intersection, the angle directly across from it would be the same as well. All you need to do is subtract whatever angle you have from 180 to get the angle adjacent to it.

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If you know 1, then you can figure out the supplementary angle since they should both equal 180 degrees

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You can first find the supplement/corresponding of the angle you know, then look for opposite angles. The others should be congruent to the first set.

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take the first angle you know, and find the first congruent angles. and then find the supplementary angles that add up to 180 ° . Then find the other angles and vice versa.