Предмет: Геометрия, автор: janna49

помогите
очень срочно

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Ответы

Автор ответа: Zhiraffe

1) угол ВАС равен полуразности дуг, которые стороны высекают в окружности, =1/2*(130-42)=88/2=44 градуса.

2) по теореме о касательной и секущей: 64=4*(4+x) <=> 16=4+x <=> 12=x.

janna49: спасибо, я еще 3 выложила

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