Предмет: Геометрия, автор: Inweastep

помогите пожалуйста решить

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Автор ответа: kytanidze

4137             <ABB1=180*-150*=30*
<A=90*-30*=60*     <CAA1=60:2=30* тогда СА1=1/2 АА1=10
АС по тПифагора =√20²-10²=√300=10√3
4141              СД=√100-25=√75=5√3
<A=30*    AC=CDx2=10√3
AD=√300-75=√225=15                AD=15

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