Geometry Vocab

obtuse triangle

• an angle more than 90 degrees but less than 180

• a triangle with one angle more than 90 degrees

• a triangle with one right angle

• a triangle with 3 acute angles

right triangle

• a triangle with 3 acute angles

• an angle measuring exactly 90 degrees

• triangle with one 90 degree angle

• a triangle with an angle more than 90 degrees

equilateral triangle

• triangle with 3 congruent sides

• triangle with 2 congruent sides

• triangle with no congruent sides

isosceles triangle

• triangle with no congruent sides

• triangle with three congruent sides

• triangle with two congruent sides

scalene triangle

• triangle with no congruent sides

• triangle with two congruent sides

• triangle with three congruent sides

parallelogram

• a parallelogram with 4 right angles

• a parallelogram with 4 equal sides

• a quadrilateral with 2 sets of parallel sides

• a quadrilateral with one set of parallel sides

square

• a parallelogram with 4 equal sides and 4 right angles

• a parallelogram with 4 right angles

• a quadrilateral with two sets of parallel sides

• a quadrilateral with one set of parallel sides

rectangle

• parallelogram with 4 congruent sides

• 4 sided shape

• parallelogram with 4 right angles

• parallelogram with 4 right angles and 4 congruent sides

trapezoid

• quadrilateral with one set of parallel sides

• a 4 sided figure

• parallelogram with two sets of parallel sides

vertex

• a flat surface

• where faces meet

• where edges meet