76 Using Graphs & Geometry
Measurements Menu Tools
6: Ray Constructs a ray, defined by two
points or by a point and a direction,
extending infinitely. If you press
g
while creating the ray, you limit its
orientation, relative to the x-axis or
the horizontal aspect of the screen,
by 15- increments.
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7: Tangent Creates a tangent line.
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8: Vector Constructs a vector with magnitude
and direction defined by two points.
If you press
g while creating the
vector, you limit its orientation,
relative to the x-axis or the
horizontal aspect of the screen, by
15- increments.
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Tool name Tool function Press:
1: Length Displays the distance between two
selected points or the length of a
segment, perimeter, circumference,
or radius.
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2: Area Displays the area of a selected
polygon or circle.
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3: Slope Displays the slope of a selected line
or segment. A vertical slope is
represented by %.
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4: Angle Displays the measure of an angle or
an angle defined by three selected
points.
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5: Integral Calculates and displays the
numerical value of the integral of a
selected function, and shades the
area between the curve and the
x-axis from point a to point b.
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Tool name Tool function Press: