Geometry Terms 4th grade

Front

An angle that is less than 90 degrees

Back

acute angle

Front

A triangle with 3 acute angles

Back

acute triangle

Front

A triangle with three congruent sides

Back

equilateral triangle

Front

An angle that measures more than 90 degrees but less than 180 degrees.

Back

Obtuse angle

Front

a triangle with one obtuse angle

Back

obtuse triangle

Front

Line in the same plane that never intersect

Back

parallel lines

Front

a quadrilateral with two pairs of parallel sides

Back

parallelogram

Front

Lines that intersect to form right angles.

Back

Perpendicular lines.

Front

having the same size and shape

Back

congruent

Front

lines that cross at a point

Back

intersecting lines