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Geometry Chapter 1 Terms to Memorize
Segment Addition Postulate
If B is between A and C,
Then AB + BC =AC
Definition of Congruent
Segments
Definition of Congruent Angles
Angle Addition Postulate
If AB = AD
Then AB  AD
If mBAC  mDEF
If P is in the interior of RST
Then BAC  DEF
Then
Definition of an Angle Bisector
If an angle is bisected,
(Such as ACB )
If  A is a right angle
If a Segment is bisected
Then it is divided into 2 = angles
Definition of a Right Angle
Definition of a Segment Bisector
(such as AC )
Definition of a Midpoint
Definition of Complementary
Angles
Definition of Supplementary
Angles
mRSP  mPST  mRST
mACD  mBCD
then mA  90
Then it is divided into 2 =
segments AB = BC
Then it divides a segment into 2
= segments
AM+MB=AB
If the sum of the measures of the Then the angles are
angles is 90 degress
complementary
If the sum of the measures of the Then the angles are
angles is 180 degrees
supplementary
If M is on AB