Here is a very complete article on how to use the triangle www dot wikihow dot com/Play-the-Triangle
The Triangle is my favorite shape.
Pythagoras's Theorem is used to determine if a triangle is a right triangle or not.
To circumscribed a circle about a triangle you use the angle. This is to get the right measurements.
The way you use a scale factor to enlarge a triangle is to multiply each side of the triangle by that scale factor. Your triangle will then be that many times larger.
any right triangle
triangle
do it
A right triangle.
ASA
square triangle square triangle or you just use sharingan.
You use Lami's theorem wen you triangle of forces to calculate the sides of the triangle or the angles opposite to a side.
Use either the Sine or Cosine rules depending on the information you know about the triangle.