Hp Prime Graphing Wireless Calculator Instrukcja Użytkownika Pobierz pdf (Strona 38)

34 Geometry

Reflection A reflection is a

transformation which maps

an object or set of points

onto its mirror image, where

the mirror is either a point or

a line. A reflection through a

point is sometimes called a

half-turn. In either case, each

point on the mirror image is the same distance from the mirror

as the corresponding point on the original. In the example at

the right, the original triangle D is reflected through point I.

1. Tap , tap Transform, and select Reflection.

2. Tap the point or straight object (segment, ray, or line) that

will be the symmetry axis (that is, the mirror) and press

3. Tap the object that is to be reflected across the symmetry

axis and press

E. The object is reflected across the

symmetry axis defined in step 2.

Rotation A rotation is a mapping that

rotates each point by a fixed

angle around a center point.

The angle is defined using

the angle() command,

with the vertex of the angle

as the first argument.

Suppose you wish to rotate

the square (GC) around point K (GK) through

∡ LKM in the

figure to the right.

1. Tap , tap Transform, and select Rotation.

rotation() appears on the entry line.

2. Between the

parentheses, enter:

GK,angle(GK,GL,GM

),GC

3. Press

E or tap

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Hp Prime Graphing Wireless Calculator Instrukcja Użytkownika Strona 38