trapez
Xena: Podstawy trapezu równoramiennego majà dΠugoÊci 4 cm i 6 cm, a cosinus kàta ostrego trapezu
jest
równy {1}{2}
1. Oblicz obwód trapezu
12 lut 11:48
ICSP:
|DC| = 4
|EF| = 4
|AB| = |AE| + |EF| + |FB|
|AE| = |FB|
6 = 2|AE| + 4 ⇔ |AE| = 1.
| | 1 | | |AE| | | 1 | |
cosα = |
| ⇔ |
| = |
| ⇔ |AD| = 2 |
| | 2 | | |AD| | | 2 | |
2+2+6+4 =
?
12 lut 12:02