If you mean exterior angle is twice its interior angle then an equilateral triangle will fit the given description because each interior angle is 60 degrees and each exterior angle is 120 degrees
It has 9 sides and is called a nonagon
It is a regular 5 sided pentagon
A triangle on a concave surface.
An obtuse triangle
If you mean exterior angle is twice its interior angle then an equilateral triangle will fit the given description because each interior angle is 60 degrees and each exterior angle is 120 degrees
an acute angle
It has 9 sides and is called a nonagon
It is a regular 5 sided pentagon
Providing that it is a regular polygon then it is a nonagon which has 9 sides
It is a regular 8 sided octagon whose interior angles are 135 degrees and its exterior angles are 45 degrees
Interior angle = 3 x exterior angle. Hence Int Ang + Ext Ang = 180 Substituting 3 x Ext + Ext = 180 4 Ext = 180 Ext Angle = 180 / 4 = 45 degrees. And Exterior Ang;e = 360 / number of sides. number of sides = 360/ exterior angle No. of sides = 360/45 = 8 Hence the number of sides of the polygon is '8' . It is named as an OCTAGON.
A triangle on a concave surface.
Obtuse triangle: a triangle with one angle greater than 90 degrees.
An obtuse triangle
A 90 degree angle is also known as right angle. A right angle (or 90 degrees) looks like an L shape. A square or rectangle's four corners are all 90 degrees.
It is a reflex angle of 297 degrees.