Which line segment has the same measure st?

SR is the line segment has the same measure ST .

Step-by-step explanation:

In the Δ SXR and ΔSXT .

(1) RX = XT

(As given in the figure )

(2) ∠SXR = ∠ SXT = 90°

(As given in the figure)

(3) SX = SX

(Common sides of both triangle )

Thus by using SAS congurence property .

Δ SXR ≅ ΔSXT

Thus

ST = SR

(By using the corresponding sides of the congurent triangle .)

Therefore SR is the line segment has the same measure ST .

answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.