Page 71 - Math Course 1 (Book 2)

Introduction to Geometry

locus
A locus is a set of all points or lines that satisfy or
are determined by specif c conditions.

A shape created by the set of points whose
position satisf es a given set of rules.
Draw dots on the line for point A and B.
y P(x,y) Label the points.

x
F (–4, 0) F (4, 0)
2 1

↔
Draw a line intersecting AB.
Let’s Begin

Draw Geometric Figures

Examples

Draw dots on this line for point D and E. Label the

ALGEBRA points.
Draw and label a f gure for the following situation.
↔ ↔
Plane R contains lines AB and DE, which intersect
at point P.

Add point C on plane R so that it is not collinear
↔ ↔
with AB or DE. Label the intersection point of the two lines as P

Answer

Draw a surface to represent plane R and label it. Draw a dot for point C in plane R such that it will not
↔ ↔
lie on AB or DE. Label the point.

Draw and label a f gure for the following situation.
↔
QR on a coordinate plane contains Q(–2, 4) and
R (4, –4). Add point T so that T is collinear with

Draw a line anywhere on the plane. these points.

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