2.11.
, . , , Excel ( ) . , , .
1. .
, b, . :
S = Ö p (p a) (p b) (p c),
p :
p = | a + b +c |
r :
r = | S |
p |
R :
R = | abc |
4S |
1. .xlsx.
2. , .11.
3. 2, 3, 4 (. 11.1).
. 11.1.
, 4. , c r Excel : c (column) , r (row) . Excel _.
4. 8 .
5. , 10. #! , 10, 4, 5 . .
6. , , S, R r, R r .
7. 7 . (). , S, R r. , 8 !, 10 12 (. 11.2).
.11.2.
2. .
1. R = 3. .
2. , , ( ), ACOS(). .
A = | arccos | b2 + c2 a2 |
2bc |
3. , , (). , (. 11.3).
. 11.3.
4. R : pR2 2pR.
5. , (. 11.4) : Ö(2-1)^2+(Y2-Y2)^2. .
|
|
. 11.4.
6.
R = | ||||
+ | + | |||
R1 | R2 | R3 |