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Angles by Mind Map: Angles
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Angles

Adjacent Angles

share same ray

means "next to"

Semicircle

180 degrees

supplementary, New node

supplementary

sum of 2 angles equal 180 degrees

when adjacent to each other, they form a straight line

Right Angle

2 rays are perpendicular

complementary

sum of 2 angles equal 90 degrees

90 degrees

2 line segments

all angles are supplementary and adjacent

all angles should equal 360 degrees

only 2 adjacent/ supplementary angles equal 180 degrees

known as Straight Angle

to find other angle measurements, subtract: 180-given angle

vertical angles

always equal

Measuring

one side on 0 degrees line

other line determines angle measurement

vertex is at the center of the protractor