Ответ:
<1=87⁰
<1=<4
<2=<3
<1+<2=180⁰
<2=180⁰-<1
<2=180⁰-87⁰=93⁰
<2=<3. <3=93⁰
<1=87⁰. <2=93⁰. <3=93⁰. <4=87⁰
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Ответ:
<1=87⁰
<1=<4
<2=<3
<1+<2=180⁰
<2=180⁰-<1
<2=180⁰-87⁰=93⁰
<2=<3. <3=93⁰
<1=87⁰. <2=93⁰. <3=93⁰. <4=87⁰