SA′B′C′D′ |
SABCD |
S△A′E′F′ |
S△AEF |
SA′B′C′D′ |
SABCD |
AB |
cos15° |
A′B′ |
cos15° |
A′E′ |
AE |
A′B′ |
AB |
SA′B′C′D′ |
SABCD |
A′B′ |
AB |
S△A′E′F′ |
S△AEF |
A′E′ |
AE |
SA′B′C′D′ |
SABCD |
S△A′E′F′ |
S△AEF |
| ||
2 |
| ||
2 |
| ||
2 |
2 |
6 |
2 |
6 |
2 |
1 |
2 |
1 |
2 |
3 |
3 |
3 |
A′B′ |
AB |
(2
| ||
AB |
(2
| ||||||
AB |
2 |
6 |
SA′B′C′D′ |
SABCD |
2 |
6 |
3 |
4
| ||
3 |
A.70° | B.72.5° | C.75° | D.77.5° |
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