Reflex angle:
An angle whose measure is bigger than 180 degrees but less than 360 degrees.The following is a reflex angle.
Adjacent angles:
Angle with a common vertex and one common side. <1 and <2, are adjacent angles.
Angle with a common vertex and one common side. <1 and <2, are adjacent angles.
Complementary angles:
Two angles whose measures add to 90 degrees. Angle 1 and angle 2 are complementary angles because together they form a right angle.
Note that angle 1 and angle 2 do not have to be adjacent to be complementary as long as they add up to 90 degrees
Two angles whose measures add to 90 degrees. Angle 1 and angle 2 are complementary angles because together they form a right angle.
Note that angle 1 and angle 2 do not have to be adjacent to be complementary as long as they add up to 90 degrees
Supplementary angles:
Two angles whose measures add to 180 degrees. The following are supplementary angles.
Two angles whose measures add to 180 degrees. The following are supplementary angles.
Vertical angles:
Angles that have a common vertex and whose sides are formed by the same lines. The following(angle 1 and angle 2) are vertical angles.
Angles that have a common vertex and whose sides are formed by the same lines. The following(angle 1 and angle 2) are vertical angles.
When two parallel lines are crossed by a third line(Transversal), 8 angles are formed. Take a look at the following figure
Angles 3,4,5,8 are interior angles
Angles 1,2,6,7 are exterior angles
Angles 1,2,6,7 are exterior angles
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