Oblicz obwod kwadratu ABCD wiedząc ,ze A(-2,-1) i C(2\/2-2,3)
EMILIA:
7 gru 18:43
M:
27 lut 18:42
Mei Lin:
A=(−2,−1)
C=(2
√2−2 , 3)
|AC|
2=(2
√2−2+2)
2+(3+1)
2
|AC|
2=8+18=24
|AC|=
√24=2
√6
a
√2=2
√6
| | 2√6 | | 2√12 | |
a= |
| = |
| =√12=2√3 |
| | √2 | | 2 | |
O
bw=4*a=4*2
√3=8
√3
27 lut 19:02