geometry Flashcards
The vertex is represented by a ______.
point
the part where the vertex of an angle is aligned
center
the line where the initial side of angle is aligned
baseline
starts with 0 and ends at 180 scale found in the inner arc of the protractor
inter side
starts with 0 and ends at 180
- scale found in the outer arc of the protractor
outer side
an angle whose amplitude is more than 0ªless than 90°.
acute angle
an angle whose amplitude is exactly 90°,
right angle
an angle whose amplitude is more than 90° but less than
180°.
obtuse angle
an angle whose amplitude is more than 180° but less than 360 degrees
reflex angle
Two angles ______________ if their sum is equal to 90°. If one angle is known, subtract its measure from 90 degrees to get its ______________.
complementary
Two angles are ________________ if their sum is equal to 180°. If one angle is known, subtract its measure from 180° to get is _______________,
supplementary
When _______________are given in a figure, there are two main areas:
interior. and exterior.
two parallel lines
When two parallel lines are cut by a transversal, __angles are formed.
8
Some of the angles formed when parallel lines are cut by a transversal are _________or ______ to each other.
congruent & equal
Alternate interior angles are, ______to one another.
equal
Alternate exterior angles are ______ to one another.
equal
Corresponding angles are ______ to one another.
equal
Some of the angles formed when parallel lines are cut by a transversal are __________ or sums up to 180-degree angle.
supplementary
Pair of exterior angles are _________.
supplementary
Interior angles on _________ side of the transversal line are supplementary.
same
(true or false)
Place the CENTER point of your protractor at the VERTEX where the sides of the angle meet.
align with zero (09) t the protractor on one of the sides of the angle that Read the number on the SCALE of the protractor where the second side of the angle lies. That number is the amplitude or measure of the angle.
true
(true or false)
In the figure above, the angle measured using the protractor is 60 degrees (60°) in its amplitude. The amplitude was read from 0 degree to 60 degrees of the INNER SCALE.
true
(true or false)
Mark a point as the VERTEX of the angle.
Note: The middle letter is the vertex of the angle. Label it.
true
