Предмет: Математика, автор: quuenlove8

ис. 2 4. Вычислите по рисунку 3)
б)АВ + OC, если OA = 11 см, OB = 8 см;
в) OA + CD, если CD = 9 см 2 мм, АВ = 1 см 5 мм?

Приложения:

Ответы

Автор ответа: Tinochka18

Б) АВ=ОА-ОВ=11см-8см=3см
ОВ=ОС=8см (радиусы окружности равны)
АВ+ОС=3см+8см=11см
В)CD- диаметр окружности
СО-радиус
R=1/2 диаметра
СО=1/2×9см2мм=4см6мм
СО=ОВ=4см6мм (радиусы окружности равны)
ОА=АВ+ОВ=1см5мм+4см6мм=6см1мм
ОА+СD=6см1мм+9см2мм=15см3мм

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