Definition
An angle that is opposite from another when two lines cross.
vertical angle
The supplement of a 32o angle is 148o. ( T or F )
True
An angle that shares a common side, but does not share a vertex.
non-adjacent angles
how many degrees are in a supplementary angle?
180
Which statement best describes a convex polygon?
A. It has at least one interior angle greater than 180°.
B. All its interior angles are less than 180°.
C. It has curved sides.
D. It has no vertices.
B
an angle that adds up to 180 degrees
supplementary angle
The complement of an 80o angle is 30o. (T or F)
false
a pair of angles that has the exact same measure in degrees.
congruent angles
how many degrees are in a complementary angle?
90
What is an angle that has a measure between 0 and 90 degrees?
acute angle
an angle that adds up to 90 degrees.
complementary angle
all vertical angles are congruent. (T or F)
true
A pair of adjacent angles with non-common sides that form a straight line.
linear pair
Do vertical angles have the same degree measure?
Yes, vertical angles are congruent.
Which statement best describes a concave polygon?
A. All interior angles are less than 180°.
B. It has at least one interior angle greater than 180°.
C. All sides are equal in length.
D. It has no vertices.
B
Two angles that share a common vertex and share a common side.
adjacent angle
all angles are congruent. (Tor F)
false
How many angles are formed when two lines intersect?
4
Can two adjacent acute angles ever be supplementary?
No, they would only be complementary
Which statement best describes a regular polygon?
A. It has equal sides only.
B. It has equal angles only.
C. It has equal sides and equal angles.
D. It has curved side
C
A pair of adjacent and supplementary angles.
Linear Pair
All linear pair are supplementary (T or F)
true
an angle that measures exactly 1800
straight angle
Can two obtuse angles ever be complementary?
No obtuse is greater than 90
Regular shapes are always convex or concave?
convex