Penjelasan dengan langkah-langkah:
3). <A2=64
sudut sehadap sama besar
<B2=64⁰, B4=64, B3=116 , B1=116
sudut yg brtolak belakang sama besar
<A2=<A4=64⁰
didapat sudut lain
<A1+<A2 = 180⁰
A1 = 180-64=116 A1=A3=116⁰
<A1=116 , <A2=64, A3= 116, A4 =64⁰
4). <A1+<B2+<C3+<D4 =(180-45)+(45)+(180-45)+45
= 135+45+135+45=360⁰
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Penjelasan dengan langkah-langkah:
3). <A2=64
sudut sehadap sama besar
<B2=64⁰, B4=64, B3=116 , B1=116
sudut yg brtolak belakang sama besar
<A2=<A4=64⁰
didapat sudut lain
<A1+<A2 = 180⁰
A1 = 180-64=116 A1=A3=116⁰
<A1=116 , <A2=64, A3= 116, A4 =64⁰
4). <A1+<B2+<C3+<D4 =(180-45)+(45)+(180-45)+45
= 135+45+135+45=360⁰