F.2 maths
The figure consists of a square and a semi-circle. It is given that the height of the figure is 12 cm. Find the radius of the semi circle.
回答 (2)
✔ 最佳答案
The figure我估是咁的
_____
/ \ ^
|___半圓_| |
| | | 12cm
| 正方 | |
|________| -
望住:
_____
/ \ ^ 個圓形頂到圓心=r
|________| |
->半圓同正方形連住果條
呢條係直徑=2r
姐係:
2r 同時係正方形既邊長
所以:
12cm= 半圓r + 正方形邊長 2r
因此:
12= 3r
r= ? 係自己計啦
參考: 早兩日同f2補數做完
收錄日期: 2021-04-13 22:18:34
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