Предмет: География, автор: davlatnazarovasevinc

662. Чему равна сторона квадрата, если его площадь равна: а) 4 см
б) 16 дм2; в) 81 м2; г) 9 ар; д) 25га
пожалуйста помогите ​

Ответы

Автор ответа: Санечка69
77

Нужно знать:

1) площадь квадрата находят по формуле S = а², где а - сторона

   квадрата;

2) 1 га = 100 а, 1 а = 100 м², 1 м² = 100 дм², 1 дм² = 100 см²,

   1 см² = 100 мм².

Поэтому:

а) S = 4 см², тогда а = 2 см;

б) S = 16 дм², тогда а = 4 дм;

в) S = 81 м², тогда а = 9 м;

г) S = 9 а = 900 м², тогда а = 30 м;

д) S = 25 га = 2500 а = 250 000 м², тогда а = 500 м.

Ответ: а) 2 см; б) 4 дм; в) 9 м; г) 30 м; д) 500 м.

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