trapezoid

As nouns the difference between tetragon and trapezoid

is that tetragon is a quadrilateral while trapezoid is a (convex) quadrilateral with two (non-adjacent) parallel sides.

As nouns the difference between trapezoid and conoid

is that trapezoid is (geometry|us) a (convex) quadrilateral with two (non-adjacent) parallel sides while conoid is anything shaped like a cone.

As an adjective conoid is

shaped like a cone; conical.

As nouns the difference between elliptical and trapezoid

is that elliptical is an elliptical galaxy while trapezoid is a (convex) quadrilateral with two (non-adjacent) parallel sides.

As an adjective elliptical

is in a shape reminding of an ellipse; oval.

As nouns the difference between trapezoid and echelon

is that trapezoid is a (convex) quadrilateral with two (non-adjacent) parallel sides while echelon is a level or rank in an organization, profession, or society.

As a verb echelon is

to form troops into an echelon.

As a proper noun Echelon is

an international SIGINT network to monitor and gather intelligence from satellite trunk communications.

As a noun trapezoid is

(geometry|us) a (convex) quadrilateral with two (non-adjacent) parallel sides.

As nouns the difference between oval and trapezoid

is that oval is a shape rather like an egg or an ellipse while trapezoid is a (convex) quadrilateral with two (non-adjacent) parallel sides.

As an adjective oval

is having the shape of an oval.

As a proper noun Oval

is a cricket ground in South London.

In geometry us terms the difference between trapezoid and trapezoid

is that trapezoid is a (convex) quadrilateral with two (non-adjacent) parallel sides while trapezoid is a (convex) quadrilateral with two (non-adjacent) parallel sides.

In geometry british terms the difference between trapezoid and trapezoid

is that trapezoid is a convex quadrilateral with no sides parallel and no equal sides while trapezoid is a convex quadrilateral with no sides parallel and no equal sides.

In anatomy terms the difference between trapezoid and trapezoid

is that trapezoid is the trapezoid bone of the wrist while trapezoid is the trapezoid bone of the wrist.

As a noun trapezoid is

(geometry|us) a (convex) quadrilateral with two (non-adjacent) parallel sides.

As nouns the difference between trapezoid and trapeziid

is that trapezoid is (geometry|us) a (convex) quadrilateral with two (non-adjacent) parallel sides while trapeziid is (zoology) any member of the trapeziidae.