Предмет: Геометрия, автор: ibatollaajaru

Помогите пожалуйста геометрия э ( 2 задание, 20 баллов)​

Приложения:
Simba2017: x+2x=90
Simba2017: x=30
Simba2017: lheubt jndtn yfgbien
Simba2017: другие напишут

Ответы

Автор ответа: NNNLLL54
1

Ответ:

1)   AB=BC  ( по чертежу , катет АВ не может равняться гипотенузе АС)  ,

∠В=90°   ⇒   ∠А+∠С =180°  

Углы при основании равнобедренного треугольника равны  ⇒

∠А=∠С=90°:2=45°

2)  ∠С=90°   ⇒   ∠А+∠В=180°-90°=90°  ,

 ∠А=х  ,  ∠В=2х  ⇒   х+2х=90°  ,  3х=90°  , х=30°   ,  2х=60°

  ∠А=30°  ,  ∠В=60°

NNNLLL54: он тебе ни к чему
NNNLLL54: я подписываюсь к друзьям,..
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