Question

13.
Дано: S = 36см², AN : NC = 3:1
BM : MC = 2:1, АК = КВ
ABC
-
Знайти: Sp
BKNM
A
K
B
N
M
с

Answer 1

Ответ: =19.5

Объяснение:

S(AKN)= S(ABC)* (AN/AC)*(AK/AB)= 36*(3/4)*(1/2)= 36*3/8 =13.5

S (NMC)= S(ABC)* (NC/AC)*(MC/BC)=36*(1/4)*(1/3)=36/12=3

S(BKNM)= S(ABC)-S(AKN)-S(NMC)= 36-13.5-3 =36-16.5 =19.5