Chapter 4 Congruent Triangles Flashcards
acute triangle
a triangle in which all of the angles are acute angles
base angles
the angles opposite the legs in an isosceles triangle
congruence transformations
a mapping for which a geometric figure and its image are congruent
congruent triangles
triangles that have their corresponding parts congruent
corollary
a statement that can be easily proved using a theorem
equiangular triangle
a triangle with all angles congruent
equilateral triangle
a triangle with all sided congruent
exterior angle
an angle formed by one side of a triangle and the extension of another side
flow chart proof
A proof that organizes statements in logical order, starting with the given statements. Each statement is written in a box/bubble with the reason verifying the statement written below the box/bubble. Arrows are used to indicate the order of the statements.
included angle
In a triangle, the angle formed by two sides is known as this because it is in between these two sides.
included side
The side of triangle that is a side of each of two angles.
isosceles triangle
A triangle with at least two sides congruent.
obtuse triangle
a triangle with an obtuse angle
remote interior angles
the angles of a triangle that are not adjacent to a given exterior angle
right triangle
a triangle with a right angle
scalene triangle
a triangle with no two congruent sides
vertex angle
the angle formed by the two legs of an isosceles triangle
legs
the congruent sides of an isosceles triangle or the two sides that make up the right angle in a right triangle
base
the side opposite of the vertex angle in an isosceles triangle
hypotenuse
the side opposite the right angle in a right triangle
