Question

Dau coroana .Exercitiul eate in imagine

Answer 1

a) A, O, C col=> m(AOB)+ m(BOC)=180

Not m(BOC)=2x grade => m(AOB)=x grade

=>3x=180

x=60 grade=>m(AOB)=60

b)AOB is

O=60|=> AOB echi

$a = \frac{ {l}^{2} \sqrt{3} }{4} = \frac{144 \sqrt{3} }{4} = 36\sqrt{3}$

c)N=mijl AO=> NB=med AOB

AOB echi|=> NB=h AOB

BNO

N=90,B=30|=>(T unghi 30) NB=12 cm

Similar MC=med DOC=>MC=6cm

DOC echi

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