Question

Determine o valor de x e y, sabendo que os triângulos semelhantes ​

Answer 1

A) 15 _ y

20 _ 12

20y = 15 × 12

20y = 180

y = 180 : 20

y = 9

______________________

10 _ x

20 _ 12

20x = 10 × 12

20x = 120

x = 120 : 20

x = 6

B) 15 _ 5

y _ 3

5y = 15 × 3

5y = 45

y = 45 : 5

y = 9

_________________

15 _ 5

12 _ x

15x = 12 × 5

15x = 60

x = 60 : 15

x = 4

C) 15 _ 5

12 _ y

15y = 12 × 5

15y = 60

y = 60 : 15

y = 4

___________________

15 _ 5

21 _ x

15x = 21 × 5

15x = 105

x = 105 : 5

x = 7