Geometry Introduction

What is the justification (reason)?

• reflexive property

• definition of segment bisect

• definition of a midpoint

• substitution property

Given: B is the midpoint of AC. What should you conclude?

• AB + BC = AC

• AB = BC

• A is the segment bisector of BC

• ABC is a straight angle

If two lines intersect each other at right angles, the lines are ____________.

• parallel

• perpendicular

• the same

• nothing special

If two angles form a linear pair, the two angles are _________________.

• complementary

• supplementary

• congruent

• vertical

If two angles are vertical, the two angles are _________________.

• complementary

• supplementary

• congruent

• 180

Name the property of equality or congruence that justifies going from the first statement to the second statement.

• Reflexive Property

• Transitive Property

• Symmetric Property

• Congruence Property

Name the property of equality or congruence that justifies going from the first statement to the second statement.

• Reflexive Property of Congruence

• Symmetric Property of Congruence

• Distributive Property

• Transitive Property of Congruence

If <1 and <2 are complementary, then m<1 + m<2 = 90

• We added

• Subtraction Property

• Def of right angle

• Def of Complementary Angles

IF <ABC ≅ <DEF, then m<ABC = m<DEF

• Reflexive Property

• Addition Property

• Def. of congruent angles

• Def. of right angles