Angled armour is not so important these days with composite/ceramic and ERA armour. The aim now is not to deflect the penetrator but to shatter it before penetration occurs. To achieve this, the materials within some types of composite armour are sloped to impart transverse forces on the penetrator to cause it to flex and lose energy and/or break up.
The steel armour behind the composite may still be angled to increase effective thickness, assuming internal space constraints are not an issue, and the composite armour may also be angled, flat, or a combination of the two.
