问题
填空题
菱形的两条对角线长为(2
|
答案
由题意知:
S菱形=
×((21 2
+35
))×((22
-35
))2
=
×[(21 2
)2-(35
)2]2
=
×(20-18)1 2
=1.
故答案为:1.
菱形的两条对角线长为(2
|
由题意知:
S菱形=
×((21 2
+35
))×((22
-35
))2
=
×[(21 2
)2-(35
)2]2
=
×(20-18)1 2
=1.
故答案为:1.