1 | ||
sin β = | −> β = 30o −> α = 90 − 2*30 = 30o | |
2 |
1 | π | |||
PΔ(ACB)=a2− | πa2=a2*(1− | )− pole trójkąta krzywolinioego | ||
4 | 4 |
1 | a2√3 | 1 | ||||
P=PΔABE=a2−[ | π*a2+ | + | πa2]= | |||
12 | 4 | 12 |
πa2 | a2√3 | |||
=a2− | − | |||
6 | 4 |
πa2 | πa2 | a2√3 | ||||
S=a2− | −2*(a2− | − | )⇔ | |||
4 | 6 | 4 |
πa2 | a2√3 | |||
S= | + | −a2 | ||
12 | 2 |
πa2 | a2√3 | πa2 | a2√3 | |||||
4*(a2− | − | + | + | −a2)+X=a2 | ||||
6 | 4 | 12 | 2 |
πa2 | ||
X=a2+ | −a2√3 | |
3 |
π | ||
X=a2*(1+ | −√3) | |
3 |