Angles
How many degrees are in an acute angle?
Less than 90*
A polygon with six sides is called a __________.
Hexagon
Define parallel lines.
Two co-planar lines that will never intersect.
How many degrees are in a right angle and how is it marked as such?
90* and with a square corner
Points that lie on the same line are called ________________ lines.
Collinear
How many degrees are in an obtuse angle?
What is a rhombus?
A parallelogram with four congruent sides?
A line through point A, B and C can be names ABC. True or false?
False. Use two points only.
If you draw an angle bisector for an angle that measure 110*, each resulting angle will measure ________.
55*
What are coplanar points?
Two or more point that lie in the same plane?
Two angles that add up to 90* are __________ angles.
Complementary
A polygon with exactly one pair of parallel sides is called a ________________.
Trapezoid.
What are perpendicular lines?
Two angles that add up to 180* are called ______________ angles.
Supplementary
A triangle with two equal sides is called a(n) __________ triangle.
Isosceles
What are vertical angles?
Two angles directly across from each other when lines intersect.
A regular polygon has ___________ and ________.
Equal sides and equal angles.
If two lines intersect, they can intersect at two points. True or false?
False. They will intersect at one point only.
All supplementary angles are linear angles. True or false?
False
What is the midpoint of a segment?
Define an angle bisector.
A ray from a vertext that divides an angle into two equal parts.
A _________ is a line segment connecting any two non-consecutive vertices in a polygon.
Diagonal.
For every segment, there is one and only one midpoint. True or false?
What are linear angles?
Angles that are on the same line (and add up to 180*)
When light hits a mirror, the incoming angle is equal to the outgoing angle. True or false?
True