Geometry identify the property or postulate vocabulary

Question 0

Reflexive property

Answer 0

Segment AB = Segment AB or <ABC= <BCA

Question 1

Subtraction property

Answer 1

If a=b, then a-c=b-c

Question 2

Substitution property

Answer 2

If a=b a can replace b or b can replace a
Ex: x+y=10 and x=2, then 2+y=10
Ex: x+y=10 and y=x,then y+y=10

Question 3

Linear pair theorem

Answer 3

If <A and <B are a linear pair, then <A and <B are supplementary

Question 4

Complementary angles

Answer 4

<A+<B=90°

Question 5

Congruent angles or segments

Answer 5

<A is congruent to <B, which means <A=<B or segment AB is congruent to segment CD, which means segment AB= segment CD

Question 6

Theorem

Answer 6

Any statement you can prove

Question 7

Multiplication property

Answer 7

If a=b, then a(c)=b(c)

Question 8

Symmetric property

Answer 8

If segment AB is congruent to segment to CD, them segment CD is congruent to segment AB

Question 9

Segment addition postulate

Answer 9

segment AB + segment CD = segment AD

Question 10

Midpoint

Answer 10

Segment DE is congruent EF; E is the _______

Question 11

Angle bisector

Answer 11

A ray that divides an angle into two congruent angles.

Question 12

Postulate

Answer 12

A statement that is accepted as true without proof. Also called an axiom.

Question 13

Division property

Answer 13

If a=b, then a/c=b/c when c doesn’t =0

Question 14

Transitive property

Answer 14

If <A is congruent to <B and <B is congruent to <C, then <A is congruent to <C or if segment AB is congruent to segment CD and CD is congruent to segment EF, then segment AB is congruent to EF

Question 15

Angle addition postulate

Answer 15

M<ABC + M<CBD = M<ABD

Question 16

Supplementary angles

Answer 16

<A+<B=180°

Question 17

Segment bisector

Answer 17

A line, ray, or segment that divides a segment into two congruent segments.

Question 18

Proof

Answer 18

An argument that uses logic, definitions, properties, and previously proven statements to show that a conclusion is true

Question 19

Addition property

Answer 19

If a=b, the a+c=b+c