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180 Geometry
Example:
similarity(0, 3, angle(0,1,i),point(2,0))
dilates the point at (2,0) by a scale factor of 3 (a point at
(6,0)), then rotates the result 90° counterclockwise to create a
point at (0, 6).
translation
Translates a geometric object along a given vector. The vector
is given as the difference of two points (head-tail).
translation(vector, object)
Examples:
translation(0-i, GA) translates object A down one
unit.
translation(GB-GA, GC) translates object C along the
vector AB.
Measure Plot
angleat
Used in Symbolic view. Given the three points of an angle and
a fourth point as a location, displays the measure of the angle
defined by the first three points. The measure is displayed,
with a label, at the location in the Plot view given by the fourth
point. The first point is the vertex of the angle.
angleat(point1, point2, point3, point4)
Example:
In degree mode, angleat(point(0, 0), point(2√3,
0), point(2√3, 3), point(-6, 6)) displays
“appoint(0,0)=30.0” at point (–6,6)
angleatraw
Works the same as angleat, but without the label.
areaat
Used in Symbolic view. Displays the algebraic area of a
polygon or circle. The measure is displayed, with a label, at
the given point in Plot view.
areaat(polygon, point) or areaat(circle,
point)