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= 90 - 60
= 30
2A = 30
A = 30÷2 = 15
~~~~~~
3B = 45
B = 45 ÷ 3 = 15
~~~~~~
1 Garis = 180 derajat
180 - 45 = 135
5C + 35 = 135
5C = 135 - 35 = 100
C = 100 ÷ 5 = 20
~~~~~~~
180 = 45 + 80 + 5D
5D = 180 - 45 - 80 = 55
D = 55 ÷ 5 = 11
~~~~
Semoga mengerti dan dapat membantu ~
gambar 1
sudur L = 60drjat + 2a
90drjt= 60drjt +2a
90-60 = 2a
30 = 2a
a = 30/2
a= 15
gambr 2
sudut 1
90drjt = 5c+35drjt
90-35 = 5c
55 = 5c
c= 55/5
c= 11
sudut 2
90drjt =3b
b =90/3
b=30
sdut 3
90 drjt =80dtjt+5d
90-80=5d
d =10/5
d=2