A diagonal joining opposite angles is the principal diagonal. It may or may not bisect the angles, and that does not affect its name.
Kite
The line is called a diagonal if it is drawn between two nonadjacent angles.
If your are referring to a triangle, then the vertices (angles) are identified using capital letters. So, for example, you can have a triangle ABC.The sides opposite to each angle are labelled in lower case.a is opposite ∠A, b is opposite ∠B, and side c is opposite ∠C
VX
You can use trigonometry to find the solution. A diagonal divides a square into two triangles, known as "45-45-90" triangles (because of the measures of each angle). According to a law of the same name, the hypotenuse (side opposite of the 90o angle) has a length equal to the length of a leg (side opposite of a 45o angle) times the square root of two. So, since the hypotenuse is a diagonal, you will find that the length of each side of the square is 6 divided by the square root of 2. Find the square of this, and you have the total area: 18 square yards.
Kite
bicycle
The recreational toy you are referring to is called a "quadrant." A quadrant typically features a frame that bisects angles, allowing for various geometric play and exploration. It often serves as both a toy and an educational tool to teach concepts related to angles and geometry.
diagonal
diagonal
A diagonal
They're the 'base angles'.
The line is called a diagonal if it is drawn between two nonadjacent angles.
Diagonally opposite angles of a rectangle or square is one example.
Parallelogram
Rectangle or a square.
A parallelogram.