| Title | Measurement tool for a circle area |
| Year | 2017 |
| Country | TW、US |
| Inventor | GUO, JIN-GUO |
| Co-inventor | XU, ZHAO-FU |
| Cert. No. | I588445、US10,107,664B2 |
| Introduction | A measurement tool for circle area includes a cylinder, a rectangular container and a pipe. The cylinder is provided with a first opening and filled with a liquid. The rectangular container is provided with a second opening, and at least side surface of the rectangular container is provided with at least scale table. The pipe is arranged on the cylinder and the rectangular container and connected with the first opening and the second opening. When the cylinder is tilted, the liquid flows to the rectangular container through the pipe, and a volume of the liquid in the rectangular container is figured out according to a length, a width and a height of the rectangular container and the scale table. The volume equals an inner-cylinder volume of the cylinder. An inner-circle area of the cylinder is obtained according to the inner-cylinder volume and a height of the cylinder. |
| Validity | 2037/07/04 |
| Domain | Education_Science |
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