Question

Треугольник АВС прямоугольный уголАДВ=120 градусов СД=ДВ наидите АВ Срочно!!!!!!!!!!

Answer 1

Угол CDA=180-120=60

Угол СAD=30 т.к Сумма всех углов треугольника 180 , 180-(90+60)=30.

sinA= CD/AD

AD=CD/sinA

AD=6/sin30

AD=6 : 1/2=12

DB=AD=12

Раз DB=AB,то FDC равнобедренный и угол DAC=ABD=180-120=60

По т.косинусов AB^2=AD^2+DB^2-2AD*DB *cos 120 (cos 120=-cos60)

Ab^2=144+144-288*(-1/2)

AB^2=288+144

Ab^2=432

AB=20,7846см

AB=21

Ответ:21см

Вроде все правильно,надеюсь помогла.

 

Answer 2

Triangle ABC with a Right Angle at D and AD = 120 degrees, CD = DV, Find AB

To find the length of AB in triangle ABC, we need more information. The given information about the right angle at D and the angle AD = 120 degrees is not sufficient to determine the length of AB. We need additional information such as the lengths of the other sides or angles of the triangle.

Please provide more information or clarify the given information so that we can assist you further in finding the length of AB in triangle ABC.