What shape has an exterior angle of 20?
Answer: The polygon has 18 sides.
What is the measure of a regular 20-gon?
The measure of each interior angle of a regular 20-gon is 162°.
What shape is a regular polygon?
A polygon is regular when all angles are equal and all sides are equal (otherwise it is “irregular”). This is a regular pentagon (a 5-sided polygon).
How do you find the exterior angle of a 20-Gon?
Thus, the sum of the exterior angles will be 360°. So, for a regular 20-gon, each exterior angle is 360°/20 = 18°.
How many lines of symmetry does a 20-gon have?
20
Icosagon/Line of symmetry
What is a regular 20-gon interior angle?
162°
Icosagon/Internal angle
What is the measure of a vertex angle of a regular 20-gon?
If n = 20, then the sum of the 20 vertex angles is (n-2)180 = 18*180 = 3240, so each vertex angle in a regular 20-gon measures 3240/20 = 162, and if we take all but one we get (20 – 1)162 = 19*162 = 3078 which is right.
Is a circle a regular shape?
Is a circle a regular shape or an irregular shape? So yes, a circle is about as regular as a shape can be. You can define a circle with just a center and a radius. Compare this, for example, to the shape of a human body, which would be rather irregular, requiring a lot of information to describe it fully.
What is regular polygon with examples?
A polygon having all the sides equal are all regular polygons. Since all the sides of the polygon are equal therefore all the angles of a regular polygon are equal. The most common examples of regular polygons are square, rhombus, equilateral triangle etc.
What’s a 12 sided shape?
A dodecagon is a 12-sided polygon. Several special types of dodecagons are illustrated above. In particular, a dodecagon with vertices equally spaced around a circle and with all sides the same length is a regular polygon known as a regular dodecagon.
What is the sum of the interior angles of a 20 Gon?
A 20-gon is a 20-sided regular polygon (all sides and interior angles are equal). What is the sum of the interior angles of a 25 Gon? That’s the same as 2 times 180, which is why Mark took two from the N and THEN multiplied by 180. So: you can just remember N triangles minus circle, or sides minus 2 times 180.
Is the icosagon a 20-sided polygon or a pentagon?
In geometry, an icosagon or 20-gon is a twenty-sided polygon. The sum of any icosagon’s interior angles is 3240 degrees. The regular icosagon has Schläfli symbol {20}, and can also be constructed as a truncated decagon, t {10}, or a twice-truncated pentagon, tt {5} .
What is the interior angle of a regular icosagon?
The regular icosagon has Schläfli symbol {20}, and can also be constructed as a truncated decagon, t {10}, or a twice-truncated pentagon, tt {5}. One interior angle in a regular icosagon is 162°, meaning that one exterior angle would be 18°. The area of a regular icosagon with edge length t is