Question

Am nevoie de exercitiul5,7,11 Urgent!
Dau coroana si 55 de puncte!
Scrieti pe foaie si transmiteti ca sa insusesc tema!

Answer 1

5.a) 22/3+56/9+6+71/9=

66+56+54+71/9=247/9 cm

b) 8√3+10√3+8√3+9√3=35√3  cm

7. Se folosește formula (n-2)×180°/n

a) (4-2)×180°/4=90°

b) (5-2)×180°/5=108°

c) (6-2)×180°/6=120°

d) (10-2)×180°/10=144°

Sper că te-am ajutat!

11. a) a/2=b/3=c/4=d/6=k     a+b+c+d=360⁰       a,b,c,d --- unghiurile

a/2=k     a=2k

b/3=k    b=3k

c/4=k    c=4k

d/6=k    d=6k

2k+3k+4k+6k=360    15k=360       k=360/15=24

a=2k=48⁰    b=3k=72⁰      c=4k=96⁰      d=6k=144⁰

c)  a/6=b/8=c/10=d/12=k     a+b+c+d=360⁰       a,b,c,d --- unghiurile

a/6=k     a=6k

b/8=k    b=8k

c/10=k    c=10k

d/12=k    d=12k

6k+8k+10k+12k=360    36k=360       k=360/36=10

a=6k=60⁰    b=8k=80⁰      c=10k=100⁰      d=12k=120⁰

b)  a/2=b/3=c/6=d/7=k     a+b+c+d=360⁰       a,b,c,d --- unghiurile

a/2=k     a=2k

b/3=k    b=3k

c/6=k    c=6k

d/7=k    d=7k

2k+3k+6k+7k=360    18k=360       k=360/18=20

a=2k=40⁰    b=3k=60⁰      c=6k=120⁰      d=7k=140⁰