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  • Użytkownik Zadane
2010-01-27T17:40:57+01:00
A)
P= 5√3
Obw= 4√6 + 5
b)
P=7,5
Obw= √34 +9
27 2 27
2010-01-27T17:53:13+01:00
A) P=½*(2+3)*2√3=5√3
b²=(2√3)²+3²
b²=21
b=√21
a²=2²+(2√3)²
a²=16
a=4
Odw.=2+3+4+√21=9+√21
b)h²=5²-1
h²=24
h=2√6
P=½*(1+3)*2√6=4√6
a²=3²+24
a=√33
Obw.=1+3+5+√33=9+√33
51 2 51
2010-01-27T19:17:17+01:00
A)
P = ah1/2 = 5 * 2√3 * 1/2 = 5√3

a² = 2² + 2√3²
a² = 4 + 12
a² = 16
a = 4

b² = (2√3)² + 3²
b² = 12 + 9
b² = 21
b = √21

Obw. = 5 + 4 + √21 = 9 + √21

b)
h² + 1² = 5²
h² = 25 - 1
h² = 24
h = √24 = 2√6

c² = 3² + (√24)²
c² = 9 + 24
c² = 33
c = √33

Obw. = √33 + 4 + 5 = 9 + √33

P = 1/2 * ah = 1/2 * 4 * 2√6 = 4√6
33 4 33