My favourite sport is cycling. I have a good mountain bike and ride it mostly in summer and sometimes in spring and autumn. I like cycling because it gives me freedom. I like to explore new places. I ride across the fields and in the forest. Cycling develops allmy muscles and lungs. I ride my bike nearly every day on holidays when the weather is fine. I hope to ride longer distances this year. I advise everyone to buy a bicycle and ride it as much as possible. You will never regret it!(ПРО ВЕЛОСПОРТ)
128 см²
Объяснение:
Пусть а, в стороны прямоугольника; по свойству биссектрисы а/в=4/5;
а=4х; в=5х; а+в=4x+5x=72/2=36;
4х+5х=36
9х=36
х=36/9
х=4
Найдем другую сторону
(4+х)*2=72
х=72/2-4
х=36-4
х=32
Площадь 32*4=128 см²