Answer:
x = 21.1
y = 18.3
Explanation:
left triangle right triangle large triangle
Short leg: 12 altitude y
Long legs: altitude 16 x
Hypotenuse: y x 28
The three triangles are similar, so the ratios of the lengths of corresponding sides are equal.
hypotenuse/short leg
28/y = y/12
y² = 12 × 28
y² = 336
y = 18.3
hypotenuse/long leg
28/x = x/16
x² = 28 × 16
x² = 448
x = 21.1