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3y = 180 - 72 - (2.36)
3y = 180 - 72 - 72
3y = 36
y = 12
jadi x + y = 36 + 12 = 48 ..
mohon koreksinya jika km kurang yakin :)
2x = 72
x = 72 : 2 = 36
72 + 72 + 3y = 180
144 + 3y = 180
3y = 180 - 144
3y = 36
y = 12
x + y = 36 + 12 = 48
33. 2x + ( 3x - 5 ) + ( 4x + 14 ) = 180
( 2x + 3x + 4x ) + ( -5 + 14 ) = 180
9x + 9 = 180
9x = 180 - 9
9x = 171
x = 19
BESAR SUDUT
2x = 2 × 19 = 38
3x - 5 = 3 × 19 - 5 = 52
4x + 14 = 4 × 19 + 14 = 90
34. QSR = 180 - ( 25 + 25 )
= 130
PSQ = 180 - 130
= 150
PQS = 180 - ( 50 + 50 )
= 80
PQR = PQS + SQR
= 80 + 25
= 105
Jadi, PQR merupakan sudut tumpul...
Semoga bermanfaat..
Klo bisa jadikan yg terbaik ya... :)