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Bertriss
@Bertriss
July 2022
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Тема: свойства высоты прямоугольного треугольника.
Помогите с задачами 7 и 9
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oganesbagoyan
Verified answer
9)
S =1/2*AC*CB
AC² =AB* AH = AB*3/4*AC ⇒ AC= 3/4*AB =3/4*8 =6. ⇒CB =4√7.
S
=1/2*AC*CB =1/2*6*4√7=
12√7
.
X-----X
7)
S =
(8+12)*2sqrt(8*12) =20*2*4√6
=160√6.
1 votes
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Answers & Comments
Verified answer
9) S =1/2*AC*CBAC² =AB* AH = AB*3/4*AC ⇒ AC= 3/4*AB =3/4*8 =6. ⇒CB =4√7.
S =1/2*AC*CB =1/2*6*4√7=12√7 .
X-----X
7)
S =(8+12)*2sqrt(8*12) =20*2*4√6 =160√6.