An irregular pentagon.
Square
A four-sided shape with one right angle is a quadrilateral. There is no more specific term, unless it has more than one right angle or has equal sides.
Hexagon
An irregular pentagon.
A regular 12-sided polygon is called a dodecagon - from the Greek dodeka, meaning 12, and gonus, meaning angle.
a 3 sided shape is a right angle triangle
Square
A four-sided shape with one right angle is a quadrilateral. There is no more specific term, unless it has more than one right angle or has equal sides.
Hexagon
octogan
The equation for the size of an interior angle of an n-sided regular polygon is (n-2)180/n. When n=7, the interior angle of a regular sided shape would be 5x180/7 or approximately 128.57. The polygon in the question has an interior right angle (90 degree angle) and thus cannot be a regular shape. A 7 sided shape is called a heptagon. Thus, the shape described in the question is an irregular heptagon.
polygon
A right angled pentagon.
An irregular pentagon.
A triangle is a 3 sided shape. There are a few types, Isosceles, Scalene (Acute and Obtuse), Equilateral and the Right angle triangle.
A kite :) /\ \/
A Square and Rectangle are both a Quadrilaterals(A four sided shape)and have both have 4 Right Angles.In addition,a irregular Quadrilateral(A four sided shape of no sides of the same length)may have a right angle( A 90 degrees angle)but it depends on how you draw it on paper.Cretth 2010