Предмет: Геометрия, автор: doma14863

Точки А,B,C,D поділяють коло на 4 дуги так, що дуга AB відносяться до дуги BC, відносяться до CD, відносяться до АD=3:5:7:9. Знайти кути чотирикутника ABCD
Помогите пожалуйста, очень нужно, если не сложно, отправьте фото с решением из тетради​

Ответы

Автор ответа: ildar502020
1

Ответ:

Объяснение:

∪AB : ∪BC : ∪CD : ∪АD=3:5:7:9.

3x+5x+7x+9x=360°  где  х - часть дуги окружности

24x = 360°;

x=15°;

дуга AB = 3x=3*15 = 45°.

дуга BC = 5x = 5*15 = 75°.

дуга CD = 7x = 7*15 = 105°.

дуга АD = 9x = 9*15 = 135°.

Так как углы четырехугольника -углы вписанные, то каждый из них равен половине градусной мере дуги на которую он опирается.

**************************

(Далее см. скриншот)

Приложения:
Похожие вопросы
Предмет: Алгебра, автор: hgdhhdbh
Предмет: Английский язык, автор: wiwowok
ПОМОГИТЕ ПОЖАЛУЙСТА A Choose the correct answer. 3 1 The older you get, A wisest B the wisest 2 When you reach job. A infancy B childhood Rob has a(n) ....... of sport. A slender B overweight ....... 4 George is rather ...... weight. you become. C wiser D the wiser you are expected to find a C adulthood D adolescence build because he does a lot A skinny B plump C slim D lean 5 They use the ........ to grow a variety of crops. A land C country B homeland D village C stocky D athletic he should lose some 6 Don't tell me your car has broken ........ again! A up B into Coff D down with me and tell A berry B berrys 7 I can count on John to be me the truth. A flat B fair C frank D feeble 8 Joe ........ on his project for four hours now. A is working C has worked B works D has been working 9 The women of the tribe gather fruit and ........ to eat. A What B How C berries D berryes terrible that you were ill on holiday! C What a D What an 11 Sam is ......... the smartest person in the class. A a bit B by far C far D much 12 During the day, the men of the tribe......... the desert looking for food. A wander B wonder C walk D crawl 13 This cottage is much ........ than the hotel we stayed in. A the prettier B prettiest C pretty D prettier 14 My grandparents A live Bare living 15 17 friendly girl Francis is! What a A B How 16 You can always count .... A on B in 1 *****... 19 Jamie abroad since they retired. C lives D have lived C for animals on a farm is hard work. A Gathering C Growing B Hunting D Raising 18 The houses have white ........ in the summer. A roof A is wanting B has wanted 20 My brother is very things. C What D B rooves A sensitive B selfish What an C roofes D roofs to move to the big city to find a job. C wants D has been wanting .; he never shares his B: a Amy to lend a hand. D at Everyday English B Choose the correct response. C sensible D self-confident A: What do you think? B: a I couldn't agree more. b I don't think so. b I quite agree. 2 A: I believe that family is more important than friends. I can't believe it. to keep them cool 3 A: What's your opinion? B: a Certainly not. b I don't agree. b Of course not. 4 A: He's a very generous person. B: a That's right. 5 A Don't you agree? B: a Not really. b That's not true.​