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acute angle

an angle LESS than 90 degress

right angle

an angle exactly 90 degress

equilateral triangle

all sides are equal length

isosceles triangle

triangle with two sides equal

scalene triangle

triangle with no sides equal

obtuse angle

an angle bigger than 90 degress but less than 180

straight angle

measures 180 degrees

reflection

"flip" of object

translation

object just moves or slides

rotation

object turns

dilation

object gets bigger or smaller

parallel

lines that never intersect

perpendicular

lines that intersect at 90 degree angles

180 degrees

sum of angles in a triangle

360 degrees

sum of angles in a quadrilateral

360 degrees

degrees in a circle