Answers+to+Practice+Problems

List the answers to your practice problems on this page. Include the textbook section number.

Deandra Donato: 5.3 Medians and Altitudes-from notes Medians: 1) LI=16.5 EI=49.5 2) x= -2 3) LG= 12 4) FL=14 LJ=7

Altitudes: 1) x=20 2) AC =96 3) AD=40 4) DC= 56

True or False? 1) True. (when isosceles) 2) True. (when isosceles) 3)True. (centroid) 4) False. (right is on and obtuse is outside the triangle)

1.2 Points, Lines, and Planess David Raleigh 1. Points D, E, and F are collinear. 2. Points D, E, F, and G are coplanar. 3. Line DB intersects the two planes. 4. Yes. 5. Yes, any two points are collinear. 6. Yes, any three points are coplanar.

1.6 1. ETF and KTH 2. x=33 3. x=50

3.5 Using Properties of Parallel Lines 1. line d is parallel to line b using the Dual Parallel Theorem 2. line c is parallel to line a using the Dual Parallel Theorem 3. line a is parallel to line b using the Dual Perpendicular Theorem

4.5 Using Congruent Triangles 1. AB is congruent to CD by CPCTC. 2. MSIITR by Alternate Interior Angles Converse. 3. Triangle BCE is congruent to Triangle DCE by SAS Congruence Postulate.

4.6 Isosceles, Equilateral, Right triangles 1. Y= 63 X= 54 2. 3. X= 18
 * Statements || Reasons ||
 * 1. D is the midpoint of CE, <BCD and <FED are right angles. || 1. Given ||
 * 2. <BCD congruent to <FED || 2. Right Angle Congruence Theorem ||
 * 3. CD is congruent to ED || 3. Definition of a midpoint ||
 * 4. BD is congruent to FD || 4. Given ||
 * 5. Triangle BCD is congruent to Triangle FED || 5. HL congruence Theorem ||


 * 3.1 Lines & Angles - Laura Bilash**

(Answers may vary) 1A. < 1 and <5, <2 and <6, <4 and <8, <3 and <7 1B. < 2 and < 8, < 1 and < 7 1C. < 4 and < 5, < 3 and < 6

(Answers may vary) 2A. Line TS 2B. Line SW, line TX

3A. Consecutive Interior 3B. Alternate Exterior 3C. Corresponding 3D. Alternate Interior