The only rectilinear figure is a triangle, or one composed of several triangles joined together.
No, only adult reptiles can make reptiles. If you're familiar with the concept of Tangrams, you can make several reptiles from the seven shapes, after having putting them together to make an isosceles triangle.
Make several measures of the length and add the results together. Divide by the number of measurements taken.
This varies according to the polygon. A polygon is any 2D closed shape with three or more straight sides. Therefore, a polygon such as a square will have four lines of symmetry, but an irregular hexagon may have several or none. Even a triangle can have between zero and three lines of symmetry, depending on the type of triangle it is.
I am sure there are several; the simplest would be a right triangle, which means, a triangle with a right angle.
Several dozen employees of Triangle Shirtwaist, all women and mostly young, died in a fire there, partly because the doors were locked (to prevent employees from leaving early). The result was legislation requiring various safety measures in factories.
I am sure there are several; the simplest would be a right triangle, which means, a triangle with a right angle.
The Bermuda Triangle is not a set defined area, and different accounts of the Bermuda Triangle give different measurements of it. In most of these, there are several islands.
There are several different formulas. The best one to use depends on what information you have about the rest of the triangle.
There are several different formulae for the area of a triangle - depending on the available information - and these were invented by different people.
It is a congruence theorem. There are several of them and they are not all numbered the same way.
There are different formulae, depending on what you DO know. Here you will find several: http://en.wikipedia.org/wiki/Triangle#Computing_the_area_of_a_triangle
There are several different ways and the answers depend on what is known about the triangles.
Baldwin measures several hundred miles.
Nobody currently knows, but there are several theories you can research. Larry Kusche's book, "The Bermuda Triangle Mystery-Solved" is your best source of info on this.
There is no single formula: there are several, depending on what information you have and what you wish to know.
The likely words are:triangular - in a triangle shapetarantula - any of several large spider species