Page 13 - GEOMETRY
P. 13

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                         .  h      5               .  h     5r
                     r rrrr rrrr cr                          r
                      .   h   5                               h
                                                                                                        2
                                                                            3  c                   9   c
                                               9.rerr..rh..7            crcr                   cmcr
                                                                                                      2
                                                                              c                    2 c + 9
                                                                                                    (
                                                                                2                  2 c 2  9 )
                                                                            2 c  c9
                                                   r 3
                                       r                                c cr     2             c cr   2
                                       2
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                                      c           c
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               crcr ( 1 3
                                           .   5                                                        9.rerr..rh..7
               c crchr rr c cr r rr c       r  + r  )                                A                   B
                      .  h  .   h     c cr ( 1  3
        ..7.   d.rr..r rP..r.r rr.trdPrr.rrr......rrr. ..rrr.
               r.r..r.rr....rrrrd.r.r.rrtrmrr.rr rr..d..rrP..r.
               P..rrrrrr.r..rr..r..r..tr..rrr.rr.rr.rr .r.rr...
               r.r7r..trer..rr.rrer...r. tr. rr.rr. rrr.rr..
                                           .   h      5
               ...rr.r..rr..rr.r..r.rr....r..rrrr.rr..rPr.r.rcr.                                          F
                                                                                  E
               ..cr..rd r?
                              dPr                            rt
                                                                           F                                        C
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                                                                        crcr.r:r5              cmcr.r:re
                               7r     er        er       . tr.
                                                          .   h         c cr.r:rm              c cr.r:r7
                   . r                  d r
                     5
                                                                 ....   d.r r..r ......r. r .r rr.tr r..r rrr..r.rr ..r r..
                                                                        .rr...rr.r5r...rrmrr.rreerrr.rr..rrrr..r.r.
                                               9.rerr..rh..7            .r..rr.rrre.rr.rd.rd..rr.r.rrrr.rrm.rd.rrrrr-
                                                                        rr..tr 9rr.rd.rd..rr.r.rrrr.rrmr.r..rr.rrrrsr:
                                                                        smrcr.r:rhrr.rr drr.rd.rd..rr.r.rrrr.reer.r..
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                                                     T
                                               C
                                                                                                  5r..r    rmr    eer
                                      B
                                 A                                                                                   9t
                                                                        rmr                      rsr:rsmrcr.r:rhr     d
                        P
                                       O 2
                                                                        eer                     e.r:r.ercr.r:rhr   sr
                                              O 3
                                                                                            M
                                                                                      C
               crcr.m 5                       cmcre 5

               c crh7 5               c cr.c 5
        ..m.   rm rr.rrrrrrr. ..rr...rr..rrr.rrr.rr....rm rr.rr..                    E       O
                                                                                A                      B
               rrr..r.rrrmcrr..trr c5r..trr  ^ m rr.rr.rr.
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               . .
                                                                                 D   H       L        F
               rm r                                       m r
                   .r                  trmr    .r                                     G
                                                                                            N
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