Question

Va rog sa răspundă cineva. Dau coroana va rog plsssssssss​

Answer 1

Răspuns:

Explicație pas cu pas:

(a)

A(0,5), B(3,1), C(3,9)

P= AB + BC + AC.

AB=[(3-0)^2 + (1-5)^2]^1/2=

=[3^2 + (-4)^2]^1/2=

=(9+16)^1/2=25^1/2=5.

BC=[(3-3)^2 + (9-1)^2]^1/2=

=[0 + 8^2]^1/2=

=(8^2)^1/2=8

AC=[(3-0)^2 + (9-5)^2]^1/2=

=[3^2 + (4)^2]^1/2=

=(9+16)^1/2=25^1/2=5

Deci P=5 + 8 +5=18

(b) D(1,6), E(6,-6), F(6,6)

P= DE + EF + DF

DE=[(6-1)^2 + (-6-6)^2]^1/2=

=[5^2 + (-12)^2]^1/2=

=(25 + 144 )^1/2=129^1/2=13

EF={(6-6)^2 + [6-(-6)]^2]^1/2=

=(0+ 12^2)^1/2=

=144^1/2=12

DF=[(6-1)^2 + (6-6)^2]^1/2=

=[6^2 + 0^2]^1/2=

=(6^2)^1/2=6

Deci P= 13 + 12 +6 = 31.

(c) M(3,3), N(-5,-5), P(7,7)

Se observa ca cele trei puncte au fiecare abscisa egala cu ordonata (adica x cu y), deci ele se afla pe aceeasi linie, data de y=x. Asadar punctele nu formează un triunghi.