Vocabulary
An exact location in space
point
An angle less than 90 degrees
Acute angle
All of my sides are the same.
Equilateral Triangle
I have two sets of parallel sides.
Parallelogram
This type of lines never intersect
Parallel
A straight path of connected points that goes forever in opposite directions
Line
This angle is exactly 180 degrees
Straight angle
None of my sides are the same size.
Scalene Triangle
I am a quadrilateral with only one pair of parallel sides and my sides can be any length.
Trapezoid
This is formed by two intersecting lines or two rays that share a common endpoint.
Angle
Part of a line with two endpoints
Line Segment
This angle is larger than a right angle, but smaller than a straight angle.
Obtuse angle
I have one angle that is 122 degrees.
Obtuse Triangle
I have four sides of equal length. Two of my angles are acute and two are obtuse.
Rhombus
An isosceles triangle has two sides that are 9 inches long. What is a possible length for the third side length? Explain.
Anything except 9 inches!
Part of a line that has one endpoint and goes forever in one direction.
Ray
These angles add up to 180 degrees.
Supplementary
All of my angles are less than 90 degrees.
Acute Triangle
I have four sides, two sets of parallel sides, and all right angles. What two shapes could I be?
Trapezoid
Angle XYZ and Angle WXY are complementary. If Angle XYZ measures 64 degrees, what is the type and measure of Angle WXY?
Angle WXY is 26 degrees and acute.
A closed figure with a least three straight sides and three angles.
Polygon
Perpendicular lines form these angles. Name the type and tell how many degrees.
Right angle, 90 degrees
I have two sides of equal length and one 90 degree angle.
Right Isosceles Trianlge
A square, rectangle, rhombus, and parallelogram all have this in common.
Two pairs of parallel sides.
Angle ABC is a straight angle decomposed into two non-overlapping angles Angle ABD and Angle DBC. If Angle ABD measures 23 degrees, what type and measure is Angle DBC?