Shapes
A shape with 4 equal sides and 4 right angles
Square
A triangle with 3 different side lengths
Scalene Triangle
Any angle less than 90 degrees
Acute Angle
A shape with 5 sides
Pentagon
A triangle with 3 equal sides
Equilateral Triangle
A quadrilateral with 1 set of parallel sides
Trapezoid
An angle that's exactly 90 degrees
Right Angle
A polygon whose sides and angles are all equal
Regular Polygon
A shape with 4 sides and 4 right angles
Any shape with 4 sides and no interior angles greater than 180 degrees
Quadrilateral
An angle that's greater than 90 but less than 180 degrees
Obtuse Angle
A polygon with 12 sides
Dodecagon
A triangle with 2 equal sides
Isosceles Triangle
A quadrilateral with 2 sets of parallel sides
Parallelogram
An angle that's exactly 180 degrees
Straight Angle
2 angles that add up to 90 degrees
Complementary Angles
A shape with 1 set of equal opposite obtuse angles and 1 set of equal opposite acute angles.
Rhombus
A quadrilateral with 2 sets of equal adjacent sides, exactly 2 equal angles, and diagonal symmetry
Kite
An angle that's greater than 180 degrees
Reflex Angle
2 angles that add up to 180 degrees
Supplementary Angles