Chapter 4-Congruent triangles Flashcards

Congruent triangles test

554252803	triangle	3-sided polygon	0
554252804	scalene triangle	no congruent sides	1
554252805	isosceles triangle	at least 2 congruent sides	2
554252806	equilateral triangle	3 congruent sides	3
554252807	acute triangle	3 acute angles	4
554252808	right triangle	1 right angle	5
554252809	obtuse triangle	1 obtuse angle	6
554252810	equiangular triangle	3 congruent angles	7
554252811	interior angles	when the triangle is extended, the _________ angles are the original angles that are in the interior of the triangle	8
554252812	exterior angles	when the triangle is extended, the __________ angles are the angles that form linear pairs with the ___________ angles	9
554252813	triangle sum theorem	the sum of the measures of the interior angles of a triangle is 180 degrees	10
554252814	exterior angle theorem	the measure of an exterior angle of a triangle is equal to the sum of the measures of the 2 nonadjacent interior angles	11
554252815	corollary to a theorem	a statement that can be proved easily using the theorem	12
554252816	corollary to the triangle sum theorem	the acute angles of a right triangle are complementary	13
554252817	congruent figures	all the parts of one figure are congruent to the corresponding parts of the other figure	14
554252818	third angles theorem	if 2 angles of 1 triangle are congruent to 2 angles of another triangle, then the third angles are also congruent	15
554252819	side-side-side (SSS) congruence postulate	if 3 sides of 1 triangle are congruent to 3 sides of a second triangles, then the 2 triangles are congruent	16
554252820	side-angle-side (SAS) congruence postulate	if 2 sides and the included angle of 1 triangle are congruent to 2 sides and the included angle of a second triangle, then the 2 triangles are congruent	17
554252821	legs of a right triangle	the sides adjacent to the right angle in a right triangle	18
554252822	hypotenuse	the side opposite the right angle in a right triangle	19
554252823	hypotenuse-leg (HL) congruence theorem	if the hypotenuse and a leg of a right triangle are congruent to the hypotenuse and a leg of a second right triangle, then the 2 triangles are congruent	20
554252824	flow proof	a proof that uses arrows to show the flow of a logical argument	21
554252825	angle-side-angle (ASA) congruence postulate	if 2 angles and the included side of 1 triangle are congruent to 2 angles and the included side of a second triangle, then the 2 triangles are congruent	22
554252826	angle-angle-side (AAS) congruence postulate	if 2 angles and a non-included side of one triangle are congruent to 2 angles and the corresponding non-included side of a second triangle, then the 2 triangles are congruent	23
554252827	legs	the 2 congruent sides in an isosceles triangle	24
554252828	vertex angle	the angle formed by the legs of an isosceles triangle	25
554252829	base	the third side of an isosceles triangle	26
554252830	base angles	the 2 angles adjacent to the base	27
554252831	base angles theorem	if 2 sides of a triangle are congruent, then the angles opposite them are congruent	28
554252832	converse of base angles theorem	if two angles of a triangle are congruent, then the sides opposite them are congruent	29
554252833	corollary to the base angles theorem	if a triangle is equilateral, then it is equiangular	30
554252834	corollary to the converse of base angles theorem	if a triangle is equiangular, then it is equilateral	31
554252835	transformation	an operation that moves or changes a geometric figure in some way to produce a new figure	32
554252836	image	the figure that is created after a figure is transformed	33
554252837	translation	an operation that moves every point of a figure the same distance in the same direction	34
554252838	reflection	an operation that uses a line of ________ to create a mirror image of the original figure	35
554252839	rotation	an operation that turns a figure about a fixed point, called the center of rotation	36
554252840	congruence transformation	an operation that changes the position of a figure without changing its size or shape	37