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ΔR = ΔP
x + 15° = 62°
x = 8y° = 180°
ΔQ = 180° - ΔS
8y = 180° - 130°
y = 50°
"maaf nomor tiga belum tau"
<R=<P
x+15=62
x=62-15
x=47
<P+<Z=180 (berpelurus yg di p garisnya d perpanjang)
62+<Z=180
<Z=118
<Z berhadapan dg <S
<Z=<S=118
<Q=180°-<S
8y=180-118
y=62/8
y=7,75
3)
PQ=RS
8=2x+2
8-2=2x
2x=6
x=6/3=2
RQ=x+5
RQ=2+5
RQ=7