click below
click below
Normal Size Small Size show me how
Geometry-Chapter 4
Geometry-Chapter 4 Vocabulary
Question | Answer |
---|---|
a polygon with three sides | triangle |
a triangle with no congruent sides | scalene triangle |
a triangle with at least two congruent sides | isosceles triangle |
a triangle with three congruent sides | equilateral triangle |
a triangle with all three internal angles measuring between 0 and 90 degrees | acute angle |
a triangle with one internal angle measuring 90 degrees | right triangle |
a triangle with one internal angle with measuring between 90 and 180 degrees | obtuse triangle |
a triangle with three conguent angles | equiangular triangle |
when the sides of a triangle are extended, the angles that are adjacent to the interior angles | exterior angles |
when the sides of a triangle are extended, the three original angles of the triangle | interior angles |
a statement that can be proved easily using a theorem | corollary |
two geometric figures that have exactly the same size and shape | congruent figures |
A pair of sides or angles that have the same relative position in two congruent or similar figures | corresponding parts |
a type of proof that uses arrows to show the flow of a logical argument | flow proof |
an operation that moves or changes a geomeric figure in some way to produce a new figure | transformation |
In a right triangle, the side opposite the right angle | hypotenuse |
In a right triangle, the sides adjacent to the right angle | legs |
The two congruent sides of an isosceles triangle | legs |
The noncongruent side of an isosceles triangle | base |
The two angles that are adjacent to the base of an isosceles triangle | base angles |
A transformation that uses a line of reflection to create a mirror image of the original figure | reflection |
A transformation in which a figure is turned about a fixed pont called the center of rotation | rotation |
A transformation that moves every point of a figure the same distance in the same direction | translation |
In a transformation the term often used to refer to the original figure | preimage |
The new figure that is produced in a transformation | image |
A congruent transformation where all side lengths and angle measurements a remain the same | isometry |
The angle opposite the base side of an isosceles triangle. | vertex angle |