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
