Overall Geometry Vocab

Front

triangle with sides of three different lengths

Back

scalene triangle

Front

triangle with all three sides equal in length

Back

equilateral triangle

Front

angle measuring 180°

Back

straight angle

Front

exactly the same shape and size

Back

congruent

Front

flat surface that extends forever

Back

plane

Front

triangle with two sides of equal length

Back

isosceles triangle

Front

angle measuring less than 90°

Back

acute angle

Front

angle measuring more than 90° but less than 180°

Back

obtuse angle

Front

a part of a line that has two endpoints

Back

line segment

Front

a straight path that extends infinitely in both directions

Back

line