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help me plsT_T. i dont know the answer​

Help Me PlsTT I Dont Know The Answer class=

Sagot :

Answer:

4

Step-by-step explanation:

We can observe that chord AD and DB is the radius of the circle D. Thus they are equal, and

AD = TB + DT

5 = 2 + DT

DT = 3

Using the Pythagorean theorem, AT is equal to,

AT² = AD² - DT²

AT² = (5)² - (3)²

AT² = 16

AT = 4