tolong bantu jawab dong beserta caranya
Jawaban:
a. Besar <BOD = 55⁰
b. Besar <AOD = 145⁰
Penjelasan dengan langkah-langkah:
a. Besar <BOD
<AOC + <COE + <BOE = 180
x + 3 + 90 + 2x - 9 = 180
3x + 84 = 180
3x = 96
x = 32
<AOC = 32 + 3 = 35⁰
<BOE = 2(32) - 9 = 55⁰
<COE + <DOE = 180, saling berpelurus
90 + <DOE = 180
<DOE = 90
<BOE + <BOD = <DOE
55 + <BOD = 90
<BOD = 35⁰
b. Besar <AOD
<AOC + <COE + <DOE + <AOD = 360
35 + 90 + 90 + <AOD = 360
215 + <AOD = 360
<AOD = 145⁰
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