một người dự định mua một giá treo đồ bằng gỗ có hình dạng như hình 13 biết các hình thoi có kích thước như nhau chiều dài hai đường chéo của mỗi hình thoi lần lượt là 40 cm và 30 cm người đó muốn treo giá gỗ trên bức hình chữ nhật có diện tích 50 dm vuông và chiều rộng là 50 cm Hỏi người đó có treo Vừa giả gỗ trên tường hình chữ nhật không

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