Question

What is the value of d? The picture is below, help me ASAP

Answer 1

D = 5

Explanation:

The line from center of the circle perpendicularly biscets chord. Hence, you can form a right-angled triangle with the radius as the hypotenuse (See picture)

So now you use Pythagoras theorem to solve for d:
a^2 +b^2 =c^2

12^2 +b^2 = 13^2

b^2 = 13^2 - 12^2

b =
`\sqrt{13^(2)-12^(2) }`

b= 5

Hence, d = 5