Angle Basics
How is an angle formed?
When 2 rays/lines meet at a point called a vertex
what are interior angle?
Angles that are
inside the parallel
lines.
What is a complementary angle?
an angle that adds up to 90 degrees
What is a supplementary angle
An angle that adds up to 180 degrees.
All angles on triangle are less than 90 degrees.
acute
What are vertical angles?
opposite angles formed by two lines that intersect. They are the same angle.
what are exterior angles.
Angles that are
outside the
parallel lines
If one of the angles is 10, what is the other one?
80
If one of the angles is 90, what is the other angle?
90
when one angle on a triangle is 90 degrees.
right angle
What are Adjacent angles?
Two angles that share a common vertex and side. (do not overlap.)
what are alternate interior angles?
Angles that are
between the
parallel lines and
on opposite sides
of the transversal.
These angles are
equal.
If one of the angles is 23, what is the other angle?
67
If one of the angles is 103, what is the other angle?
17
when 1 angle on triangle is more than 90 degrees.
obtuse angle
What are congruent angles?
It is when 2 angles are the same angle.
What are alternate exterior angles?
Angles that are
outside of the
parallel lines and
on opposite sides
of the transversal.
These angles are
equal.
If one of the angles is 57, what is the other angle?
33
If one of the angles is 87, what is the other angle?
33
when 2 sides are congruent
isosceles
which number is the vertex when looking at an angle in form of an angle.
It is the middle letter or the only letter is the vertex.
What are corresponding angles?
Angles that are in
the same position
on the two lines in
relation to the
transversal. These
angles are equal.
If one of the angles is 0, what is the other angle?
90
If one of the angles is 72, what is the other angle?
48
when all three sides are congruent
equilateral