В треугольнике две стороны равня 12 и 8 см, а угол между ними 60 градусов .Найди...

July 2022 1 5 Report

В треугольнике две стороны равня 12 и 8 см, а угол между ними 60 градусов .Найдите площадь треугольника

Answers & Comments

Улиана

Имеем треугольник ABC. AB=12, BC=8. Проведем высоту АК. Угол ВАК=90-60=30. Тогда ВК=АВ/2=12/2=6. AK=sqrt(AB2-BK2)=sqrt(122-62)=sqrt(108)=6*sqrt(3).
SABC=BC*AK/2=8*6*sqrt(3)/2=24*sqrt(3)

Можно проще:
SABC=1/2*AB*BC*Sin60=1/2*12*8*sqrt(3)/2=24sqrt(3)

0 votes Thanks 0

vyberite i vstavte v predlozhenie nuzhnoe slovo 1 there are sweets in the v

Answer

Meki5 July 2022 | 0 Ответы

v pryamougolnoj trapecii bokovye storony 15 i 9 sm a bolshee osnovanie 20 sm n

Answer

Meki5 July 2022 | 0 Ответы

raspredelite himicheskie reakcii protekayushie v sootvetstvie s privedennymi nizhe06cc19fd97a8449d554e6716112a0c2e 98304

Answer

Meki5 July 2022 | 0 Ответы

forget) in my life. Puzzled, I tried to recall if I had ever heard that voice be...

Answer

Meki5 July 2022 | 0 Ответы

11 g soli rastvorili v 99 g vody kakaya massovaya dolya soli v poluchennom rastvor

Answer

Meki5 July 2022 | 0 Ответы

Answers & Comments

vyberite i vstavte v predlozhenie nuzhnoe slovo 1 there are sweets in the v

v pryamougolnoj trapecii bokovye storony 15 i 9 sm a bolshee osnovanie 20 sm n

raspredelite himicheskie reakcii protekayushie v sootvetstvie s privedennymi nizhe06cc19fd97a8449d554e6716112a0c2e 98304

forget) in my life. Puzzled, I tried to recall if I had ever heard that voice be...

11 g soli rastvorili v 99 g vody kakaya massovaya dolya soli v poluchennom rastvor

zadachi po podobiyu treugolnikov dokazat po kakomu priznaku podobiya treugolnik

1v kakom soedinenii sera proyavlyaet valentnost ravnuyu vi so2h2s so3 na2s2

vstavte pravilnoe slovo the children were playing so that mother thought

vyberite pravilnyj glagol 1 i knew that at that moment tom waited was waiti

morfologicheskij rabor slovmechtatelnosttrezvyj etogo

рекомендуемые вопросы

Helpful Links

Helpful Social