Question

50 баллов!!!
Все 3 задачи на фото. Спасибо

Answer 1

6.

MKN=360°-120°-180°=60°

OM=ON

MK=KN

OKM=OKN=30°

KN=MK=OKcos30°=

$6 \times \frac{ \sqrt{ 3} }{2} = 3 \sqrt{3}$

10.

BM²=OM²-BO²=

$\sqrt{900 - 400} = \sqrt{500} = 10 \sqrt{5}$

r(BO)=20

BO=AO=20

AM=30-20=10

18.

$h = \sqrt{a^{2} - \frac{b^{2} }{4} }$

h=OK

a=OM

h

$h = \sqrt{100 - \frac{256}{4} } = \sqrt{36} = 6$

OK=6