there is a
TON of geometry vocab terms. so i hope i can help by telling you the ones that i learned freshman year in highschool. these are in the order that we learned them:
conditional - statement that can be written in "if...then" form.
ex: if a car is a corvette, then it is a Chevrolet
ex converse: if a car is a Chevrolet, then it is a corvette
ex counterexample: camaro? impala? Monte Carlo?
adjacent angles - two angles that are side by side
postulate - statements assumed to be true
theorems - statements that have been proven to be true
polygon - enclosed plane figure formed with three or more segments such that each one intersects the other at its endpoint
transversal - a line, ray, or segment that intersects two or more coplanar lines, rays or segments, each at a different point
skew lines - lines that are never parallel and never intersect
pre-image - original position of a figure in a plane
image - new position of a figure in a plane
rotation - transformation that moves a geometric figure about a point, known as the turn center
reflection - transformation in which a line of reflection acts as a mirror, reflecting points to their images
probability - ratio that compares the number of "successful" outcomes to the number of possible outcomes
circumference - distance around the area of a circle
net - flat figures that can be folded to enclose a particular solid figure
magnitude of a vector - length of a vector arrow
vector - a mathematical quantity that has both direction & magnitude
resultant - sum of two vectors
fractal - look the same close up as they do far away
right angle - a 90 digree angle
these aren't all of them. and i didnt include the theorems & postulates. i would recommend looking in the back of a text book in the glossary or asking your teacher if they have a math dictionary or something like that. but i hope i could help!!!