Assertion: river dolphin's flipper | /r/HasProperty | triangular
Facets:
value: in shape
type: OTHER
value: almost
type: DEGREE
Source sentences:
text: The flippers and the flukes (the tail fins) of the dolphin are triangular and have ragged hind edges.
text: The flippers are also very large in comparison with body size and are very broad, but narrow on joining the body, so are almost triangular in shape.