1
1) δавс, ∟авс = 35 °, ∟асв = 83 °, вм и ск -
высоты, пересекаются в н. найходим внс.
2) δавс.
∟а = 180 ° - (∟abc + ∟асв),
∟а = 180 ° - (35 ° + 83 °) = 62 °.
3) δавм.
∟amb = 90 ° (вм - высота),
∟abm = 180 ° - (∟амв + ∟a), ∟abm = 28 °.
4) δквс.
∟вкс = 90 ° (ск - высота),
∟вск = 180 ° - (∟вкс + ∟квс),
∟вск = 55 °, ∟abc = 35 °,
∟abc = ∟abm + ∟mbc, 35 ° = 28 ° + ∟mbc, ∟mbc = 7 °.
5) δнвс.
∟нвс = 7 °, ∟bch = 55 °,
∟внс = 180 ° - (∟hbc + ∟всн),
∟внс = 180 ° - (7 ° + 55 °), ∟bhc = 180 ° - 62 ° = 118 °.
ответ 118
это точно все дано или было что-то еще?
1. children need to help parents.2. parents can dress your child every time.3. the child has his duties to fill the bed, wash their dishes.4. if the child will have a lot of money, he will buy unnecessary things.5. if you give a child day for what he does, he will stop in further help. 1. you can pay your child for good grades, and he has a purpose to study well.2. a child may feel more liability, knowing that makes money.3. any work should be rewarded with something.4. this way you can teach a child to work.
если что не так
d=2r=2*1.5=2
l=
(4
+3
)=
25=5 см