Any rectangle that isn't a square.
rectangle
This is a special case of a quadrilateral called a rectangle.
a rectangle (that is NOT a square) has 4 right angles and consecutive sides of unequal lengths.
An acute triangle.
a circle
All triangles that are not right triangles.
right
Rectangle, octagon, hectagon, square...
Circle, cone, cylinder, sphere and equilateral triangle for example.
A rhombus
A rectangle. As long as the sides that are opposite of each other are the same length(required to get the 90 degree angles) but both sets must be different lengths or else you get a square
rectangle