Unit 1 geometry basics homework 6 angle relationships answer key

Answer:

Step-by-step explanation:

11). 6x + 7 = 8x - 17 [Since vertical angles are equal in measure]

    8x - 6x = 17 + 7

    2x = 24

    x = 12

12). (11x - 15) + (5x - 13) = 180°

    16x - 28 = 180°

    16x = 180 + 28

    16x = 208

    x = 13

13). Since DB⊥AC,

    m∠CBD = 90°

    m∠CBE + m∠DBE = 90°

    (5x - 42) + (2x - 1) = 90°

     7x - 43 = 90

    7x = 133

     x = 19

14). Since QS bisects angle PQR,

    m∠PQS = m∠RQS

    10x + 1 =

    10x + 1 = 41

    10x = 40

    x = 4

15). 10x - 61 = 18y + 5 [Vertical angles]

     10x - 18y = 61 + 5

     10x - 18y = 66

     5x - 9y = 33 ------(1)

     (18y + 5) + (x + 10) = 180 [linear pair of angles are supplementary]

     18y + x + 15 = 180

     x + 18y = 165 ------(2)

     By adding equation (1)×2 and equation (2)

     (10x - 18y) + (x + 18y) = 66 + 165

     11x = 231

      x = 21

16). (5x - 17) + (3x - 11) = 180 [[linear pair of angles are supplementary]

      8x - 28 = 180

      8x = 180 + 28

      8x = 208

      x = 26

      (3x - 11)° = 78 - 11

                   = 67°

      67° + 90° + (2y + 5)°= 180° [Sum of angles on a line]

      162 + 2y = 180

      2y = 180 - 162

      2y = 18

      y = 9

17). NP bisects ∠MNQ.

    Therefore, m∠MNQ = 2(m∠PNQ)

    8x + 12 = 2×78

    8x + 12 = 156

    8x = 156 - 12

    8x = 144

    x = 18

    m∠MNQ = (8x + 12)° = 156°

    m∠RNM = m∠ONQ [Vertical angles]

    (3y - 9)° = 180° - m∠MNQ

    3y - 9 = 180 - 156

    3y - 9 = 24

    3y = 33

    y = 11


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O/..,../Name:crn1)Unit1:GeometryBasicsDate:[/d 0I'1lPer.Homework5:Angle RelationshipsI**ThisIsa2-pagedocumenU**1.Findthe missing measure.2.Findthemissingmeasure.3.Findthemissingmeasures.4.IfthemeasureofanangleisI3",find themeasure ofItssupplement.13&'10r1/io7(/t~oI5.If the measureofan angleis38",findthemeasure ofitscomplement.IY;}06.L landL 2 form a linear pair. IfmL l=(Sx+9)"andmL2=(3x+11r.find the measureofeachangle.0°5y_..-9-1-3,,<+11=1ao8x; ,&0mL1/I0-1X~r;.0II\,,I,,:lI08~-1-~0-:.\80''It-Cl-'7.L landL2areverticalangles.lfmLl=(17x+l)"andmL2=(20x-14)",findmL217Jq\:::d0f.- 1L/I5-•'1,s~3:;<aoly)c.?:-f,~tj::-'f8.LKandLLare complementary angles. IfmLK=(3x+3)°andmLL= (lOx-4)°,find themeasureofeachangle.X-=-lfV1LYi:::.(o3x+3=.ID><-Y];1-x_L-/YV/LL-:::.~7:.1)(9.IfmLPisthreelessthan twice the measureofLQ,andLPandLQare supplementaryangles, findeachangle measure.~)(t'I-.::.\8CJYx-:-\~n10.IfmLBistwomore than three times the measure

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