Предмет: Геометрия, автор: goncharovalexan

в треугольнике АВС угол А равен 90 градусов, а угол С на 40 градусов больше угла В. найдите углы В и С

Ответы

Автор ответа: ДженниЛенни
0
Треугольник = 180 градусов 
Угол А тебе известен, 90 градусов 
180 - 90 = 90 - 2 остальных угла 
угол с на 40 гр >
угол В - х 
90 + х + х + 40  = 180 
130 + 2х = 180 
2х = 50 
х = 25 
угол В = 25 гр 
угол С = 25+40 = 65 
Похожие вопросы
Предмет: Право, автор: oyaoya87
Предмет: Английский язык, автор: sfinxfortnite11
Choose the right variant
1. Martha often ______her bike to school. (ride) A) rides B) riding C) rode
2. We _____ cricket today because it's too windy. (not play)
A) do not play B) are not playing C) did not play
3. I ______Mum with the housework every weekend. (help) A) helps B) help C) helped
4. Jean wants _____(be) a hairdresser when she leaves school. A) to be B) being C) to been
5. My brother hates ____(tidy) his room. A) to tidy B) tidying C) tidied
6. Dad enjoys _____(walk) along the beach. A) walking B) to walk C) walked
7. Genghis Khan ____(create) the Great Mongolian Empire about 800 years ago.
A) created B) create C) creates
8. Marie Curie ____ (not/die) in 1910. She ___ (die) in 1934.
A) didn’t die, died B) didn’t died, die C) didn’t die, dies
9. William Wallace ___ (fight) against England. A) fight B) fought C) fighted
10. According to an Irish legend, Finn MacCool____ (build) the Giant’s Causeway.
A) build B)builds C)built
11. Abraham Lincoln _____(become) president at the age of 52. A) became B) become C) becomes
12. The children rode their bikes _____ the road towards the lake. A) into B) along C) under
13. Go _____ the park. My school is just after the park. A) past B) over C) up
14. It hasn’t rained ____ two weeks. A) since B) for C) at
15. We’ve lived in the same house ___ 10 years. A) since B) for C) after
16. Michael ____(find) an old board game in his grandparents’ home.
A) find B) found C) is found
17. I ____ (sleep) when my brother …..(call) me.
A) was sleeping, called B) slept, was calling C) slept, called
18. _____(you/see) a film yesterday evening?
A) Do you see B) Did you saw C) Did you see
19. My family and I _____(enjoy) the festival last week.
A) enjoyed B) enjoying C) enjoy
20. Mandy _________ (go) to Disneyland with her parents last summer.
A) go B) went C) go
Буду очень благодарна если поможете) ​