Geometry Basics
The angles of a triangle add up to this
What is 180?
the rigid transformations
What is reflection, rotation, and translation?
Corresponding angles measurement
congruent
Triangle sum theorem
interior angles of a triangle add up to 180
sss
Side Side Side
The measure of a straight line
What is 180?
transformation that slides a figure
what is translation?
alternate interior angle measurement
congruent
exterior angle theorem (look at this picture)
the exterior angle equals the sum of the non-adjacent interior angles
SAS
side angle side
An angle that is 90 degrees
What is Right Angle ?
transformation that flips a figure
What is reflection?
consecutive interior measurement
triangle inequality
sum of 2 lengths of any 2 sides of triangles must be greater than the 3rd side
ASA
angle side angle
2 angles that measure add up to exactly 180
What is Supplementary?
transformation that turns a figure
what is a rotation?
parallel lines cut by a transversal make what angles
alternate interior, alternate exterior, corresponding, consecutive interior, vertical, linear pair (supplementary)
triangle with 2 congruent sides means the angles opposite them are congruent
Isosceles Triangle
HL
Hypotenuse Leg
2 angles that measure add up to exactly 90
what is complementary angles?
Transformation changes a figure's size
What is a dilation?
angles that prove lines are parallel
alternate interior, alternate exterior, corresponding, consecutive interior, vertical, linear pair (supplementary)
Perpendicular bisector
cutting another line exactly in half at 90 degree angles
Proving Congruent Triangles
SSS, SAS,ASA, AAS, HL