1. Prerequisite Skills
VOCABULARY CHECK
Classify the angle as acute, obtuse, right, or straight. 1.
m A = 115°
obtuse
ANSWER 2.
m B = 90°
ANSWER
right 3.
m C = 35°
ANSWER
acute 4.
m D = 95°
ANSWER
obtuse

2. Prerequisite Skills
SKILLS AND ALGEBRA CHECK
Solve the equation. 5.
70 + 2y = 180
ANSWER 55 6.
2x = 5x – 54
ANSWER 18 7.
40 + x + 65 = 180
ANSWER 75

3. Prerequisite Skills
SKILLS AND ALGEBRA CHECK
Find the coordinates of the midpoint of PQ .
ANSWER 1 2’ – 7 2 8.
P(2, –5),Q(–1, –2)
ANSWER – 3 2’ 1 9.
P(– 4, 7),Q(1, – 5)
ANSWER k 2 h,
10.
P(h, k), Q(h, 0)

4. Prerequisite Skills
SKILLS AND ALGEBRA CHECK
Name the theorem or postulate that justifies the statement about the diagram.
11.
2 ∠ 3 
ANSWER
Vertical Angles Congruence Theorem
12.
1 ∠ 4 
ANSWER
Corresponding Angles Postulate 
13.
2 ∠ 6
ANSWER
Alternate Interior Angles Theorem 
14.
3 ∠ 5
ANSWER
Alternate Exterior Angles Theorem