Vocabulary 1
The figure formed by two rays, called sides or arms, that share a common endpoint, known as the vertex
Angle
lines that are always the same distance apart, will never cross, have the same slope.
Parallel
The longest side of a right triangle
Hypotenuse
exactly the same shape and size
Congruent
2 angles with measures that have a sum of 180.
Supplementary
An angle less than 90 degrees
Acute Angle
a shape with 4 sides, with both pairs of opposite sides parallel
Parallelogram
an angle with exactly 90* (perfect L)
Right Angle
How many degrees are in an entire triangle?
A line that cuts across parallel lines
Transversal
an angle with exactly 180 degrees
Straight angle (straight line)
Lines that intersect (cross) at right angles
Perpendicular
flat shape with 4 right angles and 2 sets of equal parallel lines
Square
A line segment from the center of the circle to the edge. Half the diameter.
Radius
Two angles adjacent to eachother on a straight line
Real or imaginary line that divides a shape into two mirror images
Line of Symmetry
Types of transformations that do NOT change congruency
Translations, Reflections, and Rotations
Two angles with measures that have a sum of 90
Two angles that are opposite each other when two lines intersect.
Vertical
An angle greater than 90 degrees
Obtuse Angle
A point that lies equidistant between two endpoints
Midpoint
a ray, line, or segment that divides an angle into two congruent (equal) adjacent angles, starting from the vertex.
a triangle with all sides the same length
equilateral triangle
A quadrilateral with 2 congruent legs and congruent base angles
Isosceles Trapezoid