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Laying the Foundation for Understanding and Learning.
How do we name it? Write: point P Say: “point P” Tip: we only use capitol
letters to name point!!!
•PMath example:
Real Life example:
Math example: How do we name it? Write: Say: “line AB” or “line BA”
or “line “
Real Life example:
How do we name it? Write: points A, C, B are
collinear Say: SAME! Tip: when we list points we
put a comma in between.
Math example:
Real Life example:
How do we name it? Write: plane P or plane ACB Say: “plane P” or “Plane ACB” Tip: we can name a plane by
any three points in the plane OR by the the letter without a point in the corner.
Math example:
Real Life example:the top of the desk!
How do we name it? Write: points R, Q, S and V are
coplanar. Point T is not coplanar!
Say: SAME!! Tip: Keep track of points in the
same plane!!!
Math example:
Real Life example:
How do we name it? Write: Say: “segment AB” or
“segment BA” Tip: segments are named
by the two endpoints,
Math example:
Real Life example:
How do we name it? Write: Say: “ray AB” Tip: rays names always
start with the endpoint!
Math example:
Real Life example:
How do we name it? Write: Say: “ray CB” and “ray
CA” Tip: name the rays starting
from the SAME endpoint!
Math example:
Real Life example:
How do we name it? Write: -4 is the coordinate of point S Say: SAME! Tip: the coordinate is the number that marks
the points location
Math example:
How do we name it? Write: AB Say: length of AB Tip: when segment names are
written without the segment bar on top, it represents the length of the segment.
Math example:
Real Life example:ST = |-4-8| = |-12| = 12
How do we name it? Write: Q is the midpoint of Say: SAME! Tip: in geometry congruent means “an object has
the same measure” so in this picture PQ = QR
Math example:
Math example:
How do we name it? Write: Say: “segment AB is congruent to segment
CD” Tip: congruent is used to compare two things
as being the same. Equals is used to compare to measurements as being the same.
Math example:
Math example:
How do we name it? Write: <1, <A, <BAC or <CAB Say: “angle 1” “angle A” “angle BAC” “angle
CAB” Tip: there are three different ways to name
an angle! The vertex A (in this case) must be in the middle.
Math example:
How do we name it? Write: <B is a right angle Say: < means “angle” Tip: the little box in the
corner means 90 degrees.
Math example:
B
How do we name it? Write: <A is an acute
angle Say: < means “angle”
Math example:
A
How do we name it? Write: <C is an obtuse
angle Say: < means angle
Math example:
C
How do we name it? Write: Say: “ray AY is the angle bisector of angle
XAZ, so angle XAY is congruent to angle YAZ”
Math example:
How do we name it? Write: Say: “angle A is congruent to angle B” Tip: we use a line marking to show that two
different angles are congruent.
Math example:
How do we name it? Write: <1 and <2 are adjacent <3 and <4 are
adjacent Say: < means “angle” Tip: adjacent means ‘next to’
Math example:
How do we name it? Write:<1 and <2 are vertical <3 and <4 are
vertical Say: < means “angle” Tip: vertical angles are directly across from each
other.
Math example:
How do we name it? Write: <1 and < 2 are complementary <A and <B are
complementary 47 + 43 = 90 degrees….the angles sum to 90
degrees Say: < means “angle” Tip: each angle is called the complement of the other.
Math example:
How do we name it? Write: <B and <C are supplementary <3 and
<4 are also supplementary 137 + 43 = 180 degrees Say: < means “angle” Tip: they are called supplements of each other.
Math example:
How do we name it? Write: <ABD and <DBC form a linear pair. Say: < means “angle Tip: a linear pair MUST form a straight line.
Math example:
How do we name it? Write: Say: “line l is parallel to
line m” Tip: parallel lines stay the
same distance apart.
Math example:
How do we name it? Write: Say: “line m is
perpendicular to line n” Tip: perpendicular is a
tough word to remember!
Math example:
How do we name it? Write: is the perpendicular bisector of Say: line EF is the perp. Bisector of segment GH Tip: it cuts a segment in half at a right angle.
Math example:
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