Jawabanmu

2014-04-15T16:16:52+07:00
2x + 20 + x + 10 = 180 3x + 30 = 180 3x = 150 x = 50 3y = x + 10 3y = 50 + 10 3y = 60 y = 20
2x + 20 + x + 10 = 180
3x + 30 = 180
3x = 150
x = 50
3y = x + 10
3y = 50 + 10
3y = 60
y = 20
<R = 2x + 20 = 100+ 20 = 120
<S = 3y = 60
maaf enternya gk jadi
terima kasih ya KK ^_^
2014-04-15T16:18:32+07:00
A.) 
-) 2x+20+x+10 = 180 derajat
3x+30 = 180 drjt
3x = 180-30
3x=150
x=50

-) x+10+3y = 180 drjt
50+10+3y = 180 drjt
60 + 3y = 180 drjt
3y = 180 - 60
3y = 120
y = 40

b.) <R = <P , <P= 2x+20 = (2.50) + 20 = 120
<S = 3y = 3.40 = 120
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