Предмет: Геометрия, автор: Dashok23

Луч BM делит развёрнутый угол ABC в отношении 5:4, считая от луча BA. Найдите градусную меру угла ABK, если BK- биссектриса угла MBC

Ответы

Автор ответа: kamilafil

2

Відповідь:

140'

Пояснення:

АВМ=5х, МВС=4х, АВК= АВМ+ МВС/2; АВС=180'=АВМ+МВС, 5х+4х=180, х=20'; АВК=5×20+2×20=140'

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Английский язык, автор: Маша1992

Допоможіть!!!
Complete sentences using the Past Simple of the following verbs: clean, die, enjoy, happen, live, open, play,
rain, smoke, start, want, watch, finish.
1. Yesterday evening I … television. 2. I … my teeth three times
yesterday. 3. John … 20 cigarettes yesterday evening. 4. The concert last night … at 7.30 and … at 10 o’clock. 5. The accident … last
Tuesday afternoon. 6. When I was a child, I … to be a doctor. 7. Mozart … from 1756 to 1791. 8. We … our holiday last year. We … at a
very good hotel. 9. Today the weather is nice, but yesterday it … .
10. It was hot in the room, so I … the window. 11. The weather was
good yesterday afternoon, so we … tennis. 12. William Shakespeare
… in 1616.

2 года назад

Предмет: Английский язык, автор: Маша1992

Допоможіть!!!!!!
Complete the following sentences with the Present Simple
or Present Continuous forms of the verbs in brackets.

Maria is an athlete who (represent) … her country in the Olympic Games. She (run) … in the marathon, a 26-mile race. She usually (compete) … in the triathlon, which means she (have) … to run
10 kilometers, swim 1/4 mile, and ride a bicycle 25 miles. There is
only a month to go before the Olympics, so Maria (train) … hard to
prepare. During regular training, she (swim) … 1500 meters and
(run) … 5 miles, but during this pre-Olympic training, she (swim)
… less and she (run) … more. She usually (work) … out in the
weight room an hour a day, but this month she (lift) … weights for
two hours a day, or double her normal time. Cross-country skiing
is part of her winter training, but now that the weather permits,
she (bicycle) … and roller – blading, so that different muscle
groups are excited. Normally Maria (be) … careful about her diet;
she (eat) … a limited amount of fat and a lot of fruits and vegetables. Now she (make) … extra sure that she (eat) … plenty of
carbohydrates for energy. In addition, she (try) … to get enough
sleep. She (be) … confident that she’ll be prepared, mentally and
physically, for the Olympics, and she (be) … proud to be a part of
this great event.

2 года назад

Предмет: Русский язык, автор: Аноним

почему перед союзом "А"ставится запятая?

2 года назад

Предмет: Химия, автор: olenanazarenko

Яка маса солі утвориться під час взаємодії 8 г натрій гідроксиду й ортофосфатної кислоти? Вважайте, що утворилася тілтки середня сіль.

8 лет назад

Предмет: Литература, автор: Аноним

почему классный руководитель не интересуется проблемами своих учеников ?

8 лет назад