english

insufficiently
-tidak cukup
-..insufficiently long periods of time.

unreasonable
-tidak masuk akal, rewel
-your opini is unreasonable guys!!

selimut tabung
-surface of cylinder
-the side curve on cylinder
-which the surface of cylinder on this figure?

garis singgung
-tangent
-when a plane or side intersect with the plane or side.