180°-(55°35′+64°28′30″)15°20′32″÷4+27°17′32″×5
问题描述：
180°-(55°35′+64°28′30″)
15°20′32″÷4+27°17′32″×5
答
15°20′32″÷4+27°17′32″×5
=12º200'32"÷4+135º85'160"
=3º50'8"+135º87'40"
=3º50'8"+136º27'40"
=139º77'48"
=140º17'48"