How many lines of symmetry does the 15 side polygon have
The name of a polygon with 20 or more sides is called "n-gon".
A regular twenty-sided polygon is called an icosagon.
There are 20 common points.
their would be still 2 diagonal lines * * * * * There are 8*(8-3)/2 = 8*5/2 = 20 lines joining two vertices. That being the conventional definition of a diagonal, there are 20 diagonals.
Frequencies above 20kHz are not audible to humans. Sounds above this frequency are called ultrasound.
Falklands
Ultrasound is sound with a frequeny above the range of human hearing.(Above 20 000Hz)
Spain has a region called the Canary Islands. On the islands the temperature is always above 20 Celsius.
the name of a 20 sided 3d shape is called a icosahedron
All 'lines' between these two parallels are called longitude and each has a number which expresses the number of degrees east or west of the Prime Meridian.
Stratosphere is 10 - 20 miles above earth and contains the ozone layer.
icosahedron
A stanza with twenty lines is typically called a "sestet" or a "sestina." In traditional poetry forms like the sonnet or the villanelle, a sestet refers to a stanza with six lines.
How many lines of symmetry does the 15 side polygon have
A shape with 13-20 sides may be called a polygon - but only if all the sides are straight lines - and there is nothing in the question to suggest that they are.
The name of a polygon with 20 or more sides is called "n-gon".