Предмет: Алгебра, автор: Алла26072002

На клетчатой бумаге с размером клетки 1 x 1 изображён треугольник. Найдите его площадь.

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Ответы

Автор ответа: Dимасuk

4

Посчитаем по клеточкам сторону, которая построена ровно по клеточкам.
Она равна 9.
Проведём высоту к этой стороне. Высота равна 5.
Площадь треугольника равна половине произведения основания на высоту:
S = 0,5·5·9 = 22,5.

Алла26072002: ответ должен быть 20

Dимасuk: по клеточкам посчитайте, сторона тут не равна 8

Автор ответа: sedinalana

0

Измерим основание.Оно равно 9.Измерим высоту.Она равна 5.Площадь равна 1/2*9*5=22,5

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