What is the difference between angular nodes & radial nodes ?

Radial nodes are nodes which are areas of zero probability of finding an electron and radiate like circles away from the nucleus.
Angular nodes can be visualized on boundary surface diagrams as planar nodes that separate the different signs of the orbital. For example, for the 2p orbital, there is one planar node that separates the two lobes of the p orbital. Therefore, the 2p orbital would have 1 planar node. The 3d orbital would have two planar nodes that separate the four lobes of that orbital