H is the midpoint of

$$

$$

IG$.$

$$

J is the midpoint of

$$

$$

IK$.$

$$

$$

$=$

$$

$$

$=$

$10$

IG$=$GK$=10$

Quantity A

IJ

Quantity B

$5$

Quantity A is greater.

Quantity B is greater.

The two quantities are equal.

The relationship cannot be determined from the information given.