Point
Point A or
Point B
An exact position or location in a given plane.
Is represented by a dot and named with a capital letter.
Line The set of points between points P and Q in a plane and the infinite number of points that continue beyond the points.
Written as PQ$%%%%%%%%%%%%% %
P
Q
Line Segment
A line with two endpoints.Written as AB
Circle
• The set of points on a plane at a certain distance, or radius, from a single point, the center
Perpendicular Line Two lines that intersect at a right angle (90°).Written as AB PQ
$%$%%$%%$%%$%%$%%$%%$%%$%%$%%$%%$%%$%%$% %$%
Parallel Line
Lines in a plane that either do not share any points and never intersect, or share all points.Written as AB PQ
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Distance along a line
The linear distance between two points on a given line.
Degrees
The unit of measure for angles.
Acute Angle
An angle measuring less than 90° but greater than 0°.
Right Angle
An angle that measures 90°.
Obtuse Angle
An angle measuring greater than 90° but less than 180°.
Rigid transformations can also be referred to as an ISOMETRY.
Every segment is congruent to its image.
Transformations are called RIGID if every image is congruent to its preimage.
Parallelogram MATH is transformed to Parallelogram LOVE by a rotation.What is the image of HT?
V
E
A
T
M
H
O
L
EV
Find the value of each variable, given that the transformation is an isometry.
72
x6
23 y10
4 ,12 yx
6x 72x 12
3y 2 10 3y 12
y 4
Congruent
Figures are congruent if they have the same shape, size, lines, and angles.
Corresponding angles are congruent and corresponding sides are proportional
A B
D C
E F
H G
Trapezoids ABCD and EFGH are similar ABCD ~ EFGH
List all congruent angles
HD
GC
FB
EA
Write the statement of proportionality
HE
DA
GH
CD
FG
BC
EF
AB