Here are two typical leaf specimens from the red oak group, a subgroup of genus (Quercus). This is a simple (one blade), pinnate (one central vein, the mid-rib, and smaller branching veins) leaf. Notice how the leaf lobes are bristled, forming pointed ends which classify it to the red oaks species.
An outline shape of these leaves in black/white.
Also, compare the major difference between the red oaks to the white oak leaf.