1000
Triangles are the strongest structure in the world - most bridges etc include triangular metal parts to strengthen the bridge. I reccommend that you somehow create many triangles and support your textbook on top of these triangles.
two right triangles
They are Similar triangles if they have the same angles. it they are exactily the same they are Equaltrial.
if you need to know how many triangles are in a polygon ... just take the number of its sides and subtract for example. nonagon has 9 sides so it will be 9-2=7 so, a nonagon has 7 triangles
A Pentadecagon had 15 sides
A pentadecagon has 15 sides. (the prefixes pent=5, and deca=10)15
90
45
Fifteen.
i hate maths kate barney
Pentadecagon, Quindecagon, PentakaidecagonA polygon with fifteen sides can be called a pentadecagon.
The name of a 15 sided polygon is Pentadecagon.
it is called a pentadecagon ok? its like pentagon but its a pentadecagon.
its a pentadecagon i.e, a polygon with 15 sides. in a regular pentadecagon each angle is of 156 degrees
90. Number of diagonals = number_of_sides × (number_of_sides - 3) ÷ 2 → For a Pentadecagon which has 15 sides: Number of diagonals = 15 × (15 - 3) ÷2 = 15 × 12 ÷ 2 = 90
IT has 15 sides