Yes, my attempt at text art, below, is a 5-sided polygon (pentagon) with 3 right angles. _ | \ |_|
It doesn't have to, but it can. A trapezoid is any shape in which there is a pair of parallel sides. This means that a square can be classified as a trapezoid. But notice that a four-sided shape can never have ONLY three 90° angles. The sum of angles of a four-sided shape is 360--this means that if you have three 90° angles, then the remaining angle must be 360-3(90) which is 90°, giving you four right angles. * * * * * No you cannot. As indicated in the second paragraph of the above answer, three right angles implies that all four angles are right angles and that makes the figure a rectangle (or a square).
a triangle a triangle
irregular hexagon?
No. A trapezoid is any four sided shape which has at least two parallel sides. If it is four sided, cannot have exactly four right angles.
no
An acute triangle.
a Pentagon is five sided and CAN have 3 right angles.
A rhombus, an equal sided parallelogram or an equal sided quadrilateral with no right angles.
You can make a four sided shape with 3 right angles, but it must have another right angle, too. So technically, yes.
Yes, my attempt at text art, below, is a 5-sided polygon (pentagon) with 3 right angles. _ | \ |_|
It doesn't have to, but it can. A trapezoid is any shape in which there is a pair of parallel sides. This means that a square can be classified as a trapezoid. But notice that a four-sided shape can never have ONLY three 90° angles. The sum of angles of a four-sided shape is 360--this means that if you have three 90° angles, then the remaining angle must be 360-3(90) which is 90°, giving you four right angles. * * * * * No you cannot. As indicated in the second paragraph of the above answer, three right angles implies that all four angles are right angles and that makes the figure a rectangle (or a square).
A irregular hexagon
A heptagon.
a triangle a triangle
irregular hexagon?
No. A trapezoid is any four sided shape which has at least two parallel sides. If it is four sided, cannot have exactly four right angles.