Question

ME AJUDEM!!! POR FAVOR​

Answer 1

Explicação passo-a-passo:

AC ² = 4² + 3 ²

AC ² = 16 + 9

AC² = 25

AC = 5

BD/4= 3/5

BD . 5 = 3.4

5BD = 12

BD = 12/5

AB² = AD² + BD²

4² = AD² + (12/5)²

16 = AD² + 144/25

AD² = 16 - 144/25

AD² = (400 - 144)/25

AD² = 256/25

AD =  16/5

DC = 5 - AD

DC = 5 - 16/5

DC = (25-16)/5

DC = 9/5

OB² = OD² + BD²

OB² = OD² + (12/5)²

OB / BC = OD / DC

OB / 3 = OD / 9/5

OB . 9/5 = 3 . OD

9OB/5 = 3OD

OB = 3OD/9/5

OB = 15OD/9

OB² = OD² + (12/5)²

(15OD/9)² = OD² + (12/5)²

225OD²/81 = OD² + 144/25

225OD²/81 - OD² = 144/25

225OD²/81 - 81OD²/81 = 144/25

144OD²/81 = 144/25

OD² = 144/25 . 81/144

OD = 12/5 . 9/12

OD = 9/5