chevron
A chevron or arrowhead.
A rectangle or a square: both have four sides and a right-angle of 90 degrees forming the four corners.
A square is a two-dimensional shape with four equal sides and four right angles.
"Reflex angle" has four syllables. Re-flex-an-gle.
parallelogram!
In plane geometry, a shape with four sides, two of which are parallel and have the same length, cannot have a reflex angle.
chevron
A chevron or arrowhead.
A rectangle is not an angle at all. It's a flat shape that looks like a box. A rectangle can never have a reflex angle inside it. But it always has four of them on the outside.
A rectangle or a square: both have four sides and a right-angle of 90 degrees forming the four corners.
Four SIdes
A square is a two-dimensional shape with four equal sides and four right angles.
"Reflex angle" has four syllables. Re-flex-an-gle.
This is a rectangle, or the special case of the square (all sides equal).
A square has four right angles and four sides of equal length.
a square!