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32 Cards in this Set

  • Front
  • Back
collinear
points that lie on the same line
obtuse triangle
a triangle in which one of the angles is obtuse
reflexive property
any line or angle in congruent to itself
complementary angles
2 angles whose sum is 90
equiangular triangle
a triangle in which all angle's are congruent
CPCTC
corresponding parts of congruent triangles are congruent
median
a line segment drawn from any vertex of the triangle to the midpoint of the opposite side
noncoplanar
points, lines, or segments that do not lie on the same plane
acute triangle
a triangle in which all angles are acute
coplanar
points,lines, or segments that lie on the same plane
trisect
2 points that divide a segment into 3 congruent segments
altitude
a perpendicular line segment from a vertex of a triangle to the line containing the opposite side
congruent triangles
all pairs of corresponding parts are congruent
leg
the sides that are formed from the right angle
line
straight, made up of at least 2 points and extends infinitely far in both directions
hypotenuse
the side opposite the right angle
equilateral triangle
a triangle in which all sides are congruent
supplementary angles
2 angles whose sum is 180
congruent
segments or angles that have the same length or measure
isosceles triangle
a triangle in which at least two sides are congruent
right triangle
a triangle in which one of the angles is a right angle
angle
made up of 2 rays with a common endpoint
ray
made up of points and are straight and begin at an endpoint and extends infinitely far in only one direction
perpendicular
lines, rays or segments that intersect at right angles
obtuse angle
an angle whose measure is greater than 90 and less than 180
slope
the slope (m) of a nonvertical line, segment, or ray containing (x ,y ) and (x ,y ) is defined by the formula
right angle
an angle whose measure is 90
noncollinear
points that do not lie on the same line
bisect
a ray that divides an angle into two congruent angles
acute angle
angle whose measure is greater than 0 and less than 90
scalene triangle
a triangle in which no two sides are congruent
straight angle
an angle whose measure is 180