4.1 Congruent Triangles Flashcards
equilateral triangle
a triangle with 3 congruent sides
congruent triangles
if triangle abc is congruent to triangle pqr then there is a correspondence between their angles and sides such that corresponding sides are congruent and corresponding angles are congruent
isosceles triangle
a triangle with ATLEAST 2 congruent sides (2 or more congruent sides)
scalene triangle
a triangle with no congruent sides
acute triangle
a triangle with 3 acute angles
equiangular triangle
a triangle with 3 congruent angles
right triangle
a triangle with EXACTLY ONE right angle
obtuse triangle
a triangle with EXACTLY ONE obtuse angle
vertex
the intersection point of the 2 sides of an angle
the plural of vertex is vertices
opposite side
in triangle cat side CT is opposite of angle A
adjacent side
in a triangle or other polygon, two sides that share a common vertex are called adjacent sides
legs of a right triangle
in a right triangle, the 2 sides that are adjacent to the right angle are the legs
of the triangle
hypotenuse
in a right triangle, the side opposite the right angle is the hypotenuse of the triangle
legs of an isosceles triangle
in an isosceles triangle with EXACTLY 2 congruent sides, the 2 congruent sides are called the legs
base of an isosceles triangle
in an isosceles triangle with EXACTLY 2 congruent sides, the 3rd side (non congruent side) is called the base
every triangle is….
congruent to itself
reflexive POC
if triangle abc is congruent to triangle pqr then….
triangle pqr is congruent to triangle abc
symmetric POC
if triangle abc is congruent to triangle pqr, and triangle pqr is congruent to triangle tuv then…
triangle abc is congruent to triangle tuv
transitive POC
