Just Measure it
closed figure
yes, a triangle is a closed figure
an open figure is a polygon that is not completely closed.
Closed
It depends when the windows are open no, but when they are not, yes.
No, take a semicircle, it is a plane figure and is open. Or a parabola is also open and a plane figure.
A polygon, by definition, is a closed figure. So a closed polygon is an undefined object.
Lasers are now used to treat both closed-angle and open-angle glaucoma. Peripheral iridectomy is used for people with acute angle-closure glaucoma attacks and chronic closed-angle glaucoma
An acute angle looks like a book that is a more closed than open.
A close figure is a figure with no open spaces in it and is completely closed. Examples are: quadrilateral square rhombus parallelogram quadrangle rhomboid rectangle oblong kite trapezium trapezoid
It is impossible to have a two-sided regular polygon with equal length sides. The two sides would merely form an open angle, with no closed third side.
open than closed