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

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

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)

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