Unit 4 Test

Question 1

(Definition)
Congruent Triangles

Answer 1

Triangles are congruent iff all corresponding angles and corresponding sides (corresponding parts) are congruent

Question 2

(Postulate)
Side-Side-Side (SSS)

Answer 2

If 3 sides of a triangle are congruent to 3 sides of another triangle, then the triangles are congruent.

Question 3

(Postulate)
Angle-Side-Angle (ASA)

Answer 3

If 2 angles and the included side of a triangle are congruent to corresponding parts of another triangle, the triangles are congruent

Question 4

(Postulate)
Side-Angle-Side (SAS)

Answer 4

If 2 sides and the included angle of a triangle are congruent to corresponding parts of another triangle, then the triangles are congruent

Question 5

(Theorem)
Isosceles Triangle Theorem

Answer 5

If 2 sides of a triangle are congruent, then the angles opposite those sides are congruent

Question 6

(Postulate)
Angle-Angle-Side (AAS)

Answer 6

If 2 angles and the non-included side of a triangle are congruent to the corresponding parts of another triangle, then the triangles are congruent

Question 7

(Vocab)
Vertex

Answer 7

The angle included by the legs

Question 8

(Vocab)
Hypotenuse

Answer 8

The side opposite to the right angle

Question 9

Hypotenuse Leg

Answer 9

If the hypotenusecleg of a right triangle is congruent to the corresponding parts of another right triangle, then the triangles are congruent

Question 10

List the reasons for a triangle congruency:

Answer 10

• SSS
• SAS
• ASA
• AAS
• HL

Question 11

(Vocab)
Median of a Triangle

Answer 11

A segment whose endpoints are the vertex of an angle and the midpoint of the opposite

Question 12

(Vocab)
Altitude of a triangle

Answer 12

A segment from a vertex of an angle and is perpendicular to opposite side

Question 13

(Vocab)
Perpedicular Bisector of a segment

Answer 13

A line/ray perpendicular to the segment at its midpoint