Set squares are drawing instruments used to create vertical, horizontal, and diagonal lines as well as certain angles. They may be shaped as squares, Ls, or triangles, although in American usage set ...
All triangles have internal angles that add up to 180°, no matter the type of triangle. Since you know that all angles in a triangle add up to 180°, you have to add up the values of the angles ...
The sides of right-angled triangles are labelled opposite, hypotenuse and adjacent. Trigonometry explores the relationship between sides and angles in right-angled triangles. The hypotenuse is the ...