You may be fishing for "polygon", but I thinksomething in your description has gang aglae.
A right angle is a plane made up of sides joined at endpoints ..Your in 5th or 6th grade for these questions .I hope this helps ♥
Well a triangle has 3 sides and vertices.
Any polygon is.
A plane figure with eight sides is an octagon.
Any closed polygon could be made using the descriptions above.
Spatial figure is a three dimensional figure. It is made up of plane figure whose all sides are joined together to form a close figure
regular polygon-all the sides are the same length and the angles have the same measurement. polygon-a closed plane figure whose sides are segments that intersect at their endpoints.
An 8-sided plane figure is an octagon.
A quadrilateral is a closed plane figure with four straight sides.