Rotation by 90° about the

**origin**: R (**origin**, 90°) A rotation by 90° about the**origin**can be seen in the picture below in which A is rotated to its image A'. The general rule for a rotation by 90° about the**origin**is (A,B) (-B, A) Rotation by 180° about the**origin**: R (**origin**, 180°)Two Triangles are rotated around

**point**R in the figure below. For 3D figures, a**rotation**turns each**point**on a figure around a line or axis. Rotational symmetry. A geometric figure or shape has rotational symmetry about a fixed**point**if it can be rotated back onto itself by an angle of**rotation**of 180° or less.May 11, 2021 · A

**point**of**intersection**is a**point**where two lines or curves meet. We can find a**point**of**intersection**graphically by graphing the curves on the same graph and identifying their points of ...Unit circle

**definition**. Trigonometric functions can also be defined as coordinate values on a unit circle. A unit circle is a circle of radius 1 centered at the**origin**. The right triangle**definition**of trigonometric functions allows for angles between 0° and 90° (0 and in radians). Using the unit circle definitions allows us to extend the ...Connects the

**origin**to my**point**, just like that. And then I could either draw it up here, or I could draw it down here, like this. I could draw it like this. So if you rotated this 90 degrees, if you rotate this 90 degrees, this side, which is seven units long and we're going seven below the**origin**, it's now going to be seven to the right. Right?**Intercept****definition**, to take, seize, or halt (someone or something on the way from one place to another); cut off from an intended destination: to**intercept**a messenger.Apr 12, 2022 · The standard

**definition**of an octagon is something along the lines of, "An octagon is a polygon with 8 sides delimiting a closed area." Anyone with a basic understanding of Greek should be able to comfortably answer the question how many sides does an octagon have without any notions of mathematics.