5/28/2018 -slidepdf.com http://slidepdf.com/reader/full/-55cf9853550346d03397022c 1/16 ГЕОМЕТРИЧНИ ФИГУРИ И ТЕЛА Формули за обиколка, лице и обем
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P = 2..r = .d
S = .r
2
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P = a + b + c
S = + +
a .h
a
2
b.h
b
2
c.h
c
2
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:
AB OC
a b a||b.
.
A,C,D 4
AB, BC, CD, DA 4
AC P = AB+BC+CD+DA
S = S + S
2
:
ABC ACD
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- AB=DC
AD=BC
P = 2.a + 2.b
S = a.b
:
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AB=BC=CD=DA
P = 4.
S = a
2
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:
,
P = 2.
+ 2.b
S = a.h = b.h
, AB||CD AD||BC.
:
a
b
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,
P =
4
S = a.h
.
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,
P = AB+BC+CD+DE
S =
,
, .
,
.
AB||CD
a + b
2
.h
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:
S = 6a
V = a
AB=BC=CD=DA=A1B1=B1C1=C1D1=D1A1=
2
3
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:
S = 2 ab + ac + bc)
V = abc = S
.
. H = B.H
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:
S = P
.
.H
S1 = 2B + P.H V = S.. H = B.H
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8
9 :
h
k
l
S = P.. h
S
1 =
S + B V = 1/3 B.H
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a
10
:
2
S
.
= P
.
. H = 2r.H
S1 = S + 2B V = B.H B = r
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11 :
S .
= .l.r S
1 = S + B
V = 1/3B.H
B = r
2
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:
S =4r
V = 4/3r
3
2