Question

The type of muscles in which the fascicles are at an oblique angle to the tendon, and the muscle fibers resemble a large feather is called

Answer 1

They are called pennate muscles.

Answer 2

The type of muscles in which the fascicles are at an oblique angle to the tendon, and the muscle fibers resemble a large feather is called a pennate muscle.
Those are muscles that align quite nicely with the tendon, have short fibers that can go quite deeply into the tendon they are covering, and as it says above, they resemble a feather.