A square.
On octagon is a plane (2-dimensional) figure which has only one face. There are no right angles on the face of an octagon.
Internal angles of a plane figure of n sides = (2n - 4) right angles where n is 4 this gives 4 right angles ie 360 degrees
A rectangle is a plane figure with four straight sides and four right angles, esp. one with unequal adjacent sides. A square is a plane figure with four equal straight sides and four right angles. A rhombus is a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.
No plane geometric figure can have one acute and three right angle only, at least two other angles must be included
A plane figure with four sides and at least three right angles. There are other descriptions.
A 4 sided plane figure with 4 right angles.
square
A four-sided plane figure with four right angles
A sguar.
It could be a square or a rectangle. Or you could call it a quadragon.
Cjic
A square is a plane geometric figure having 4 equal sides and 4 right angles.
On octagon is a plane (2-dimensional) figure which has only one face. There are no right angles on the face of an octagon.
Internal angles of a plane figure of n sides = (2n - 4) right angles where n is 4 this gives 4 right angles ie 360 degrees
A square.
For any n-sided plane figure the interior angles total 2n - 4 right angles.
A rectangle is a plane figure with four straight sides and four right angles, esp. one with unequal adjacent sides. A square is a plane figure with four equal straight sides and four right angles. A rhombus is a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.