题目内容
菱形的两条对角线长为(2
+3
)和(2
-3
),则菱形的面积为S=______.
| 5 |
| 2 |
| 5 |
| 2 |
由题意知:
S菱形=
×((2
+3
))×((2
-3
))
=
×[(2
)2-(3
)2]
=
×(20-18)
=1.
故答案为:1.
S菱形=
| 1 |
| 2 |
| 5 |
| 2 |
| 5 |
| 2 |
=
| 1 |
| 2 |
| 5 |
| 2 |
=
| 1 |
| 2 |
=1.
故答案为:1.
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