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!!! P Math 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:

 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:

 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  = 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  = 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: