Quads - Legs

the large muscle of the front of the thigh, composed of four heads: the vastus lateralis, vastus intermedius, vastus medialis, and rectus femoris. All of these join at a common tendon attached to the kneecap and all of them are involved in extending the knee joint. The rectus femoris attaches to the pelvic girdle (above the hip joint) rather than to the femur and in addition to extending the knee, it also flexes the hip. exercises targeting this muscle include

leg extensions

squats (any kind)