а на русском есть?
Объяснение:
h =a√3/2
a-h =b => a -a√3/2 =b => a(2-√3)/2 =b => a =2b/(2-√3)
S =a^2 √3/4 = b^2 √3/(2-√3)^2
√3/(2-√3)^2 =
√3/(7 -4√3) =
√3(7 +4√3)/(7 -4√3)(7 +4√3) =
(7√3 +12)/(49-48) =
7√3 +12
S =b^2 (7√3 +12)
а на русском есть?
Объяснение:
h =a√3/2
a-h =b => a -a√3/2 =b => a(2-√3)/2 =b => a =2b/(2-√3)
S =a^2 √3/4 = b^2 √3/(2-√3)^2
√3/(2-√3)^2 =
√3/(7 -4√3) =
√3(7 +4√3)/(7 -4√3)(7 +4√3) =
(7√3 +12)/(49-48) =
7√3 +12
S =b^2 (7√3 +12)