# Wk 2 - Lauren Sims MTH 210 1 Classifying Triangles 34 True...

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Lauren Sims MTH 210 March 13, 2011 1. Classifying Triangles 34. True 42. No a scalene triangle cannot be an isosceles triangle. A scalene triangle has all three sides with unequal lengths and an isosceles triangle has only two sides that are equal 2.2 Congruent Triangles 10. 1. Given 2. 3. 4. SSS 20. m angle B = m angle O 100 + y = 5y + 20 100 = 4y + 20 80 = 4y Y = 20 22. PR = 3x – 5 PR = 3(3) – 5 = 9 – 5 PR = 4 2.3 Proof Involving Congruence

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6. Given: Line BC congruent Line CD Angle 1 congruent Angle 2 Prove: Line GC congruent Line FC 1. line BC congruent line CD – given 2. angle 1 congruent angle 2 – given 3. angle 1 and angle 3 are supplementary – adj. whose noncommon sides are in line are supp 4. angle 2 and angle 4 are supplementary – adj. angle’s whose noncommon sides in line are supp 5. angle 3 congruent angle 4 – supp of congruent angles are congruent 6. angle GCB and angle FCD are vertical angles – Def. of vert. angles 7. angle GCB congruent angle FCD – vert. angles are congruent 8.
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