Geometry Unit Two

Question 1

perpendicularity2

Answer 1

• lines/rays/segments that intersect at right angles

- don’t assume from diagram

Question 2

oblique

Answer 2

when 2 lines intersect and are not perpendicular

Question 3

complementary angles2

Answer 3

• 2 angles whose sum is 90

- each of the two angles is called the complement of the other

Question 4

supplementary angles2

Answer 4

• 2 angles whose sum is 180

- each of the two angles is called the supplement of the other

Question 5

congruent supps and comps theorems2

Answer 5

• if angles are supplementary/complementary to the same angle, then they are congruent
• if angles are supplementary/complementary to congruent angles, then they are congruent

Question 6

addition property 2

Answer 6

• if an angle/segment is added to 2 congruent angles/segments, the sums are congruent
• if congruent angles/segments are added to 2 congruent angles/segments, the sums are congruent

Question 7

subtraction property2

Answer 7

• if an angle/segment is subtracted from 2 congruent angles/segments, the differences are congruent
• if congruent angles/segments are subtracted from 2 congruent angles/segments, the differences are congruent

Question 8

addition property is used

Answer 8

when the segments/angles in conclusion are greater than those in the given

Question 9

subtraction property is used

Answer 9

when the segments/angles in conclusion are less than those in the given

Question 10

multiplication property

Answer 10

if segments/angles are congruent, their like multiples are congruent

Question 11

division property

Answer 11

if segments/angles are congruent, their like divisions are congruent

Question 12

transitive property2

Answer 12

• if angles/segments are congruent to the same angle/segment, they are congruent to each other
• if angles/segments are congruent to congruent angles/segments, they are congruent to each other

Question 13

substitution

Answer 13

to solve for a variable and then plug the answer into original equation

Question 14

opposite rays

Answer 14

2 collinear rays that have a common endpoint and extend in different directions

Question 15

vertical angles

Answer 15

when the rays forming the sides of one angle and the rays forming the sides of the other are opposite rays

Question 16

vertical angle theorem

Answer 16

vertical angles are congruent