Geometry Vocabulary

an angle that measures exactly 90 degrees and it will always have, at least, one corner that is a square

• right angle

• acute angle

• obtuse angle

• straight angle

An angle that measures EXACTLY 180 degrees...it is a straight line

• right angle

• acute angle

• obtuse angle

• straight angle

a line with a starting point but no end point ... it continues on in one direction

• straight angle

• line

• line segment

• ray

left to right

side to side

• vertical

• horizontal

• symmetry

• pair

up and down

top to bottom

• vertical

• horizontal

• symmetry

• angle

the space inside the vertex (or the point)

• angle

• shape

• line

• area

an angle that measures less than 90 degrees... (because it is tiny, it is such a cute angle!)

• right angle

• acute angle

• obtuse angle

• straight angle

an angle that measures MORE than 90 degrees... it is anywhere from 91 to 179 degrees

• right angle

• acute angle

• obtuse angle

• straight angle

a triangle with one right angle

• right triangle

• obtuse triangle

• acute triangle

a triangle with ALL acute angles

• right triangle

• obtuse triangle

• acute triangle