Geometry
A triangle that has one angle that is more than 90 degrees
What is an obtuse
A triangle with one angle that measures exactly 90 degrees
What is a right triangle
SYMMETRY: The number of lines of symmetry in a parallelogram?
What is zero?
SYMMETRY: The number of lines of symmetry in a square
What is 4?
SYMMETRY: The number of lines of symmetry in a standard rectangle.
What is 2?
SYMMETRY: The number of lines of symmetry in a trapezoid?
What is 1?