An instrument to measure area of irregular boundaries
APlanimeter
BPentagraph
CClinometer
DPedometer
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Related Questions:
Pantagraph is used for
A pipe which is installed in the house drainage to preserve the water seal of traps
The purest form of iron with low carbon content, normally less than 0.15 percent
A stable submerged body has:
The deposition of alkali salts on the inside walls of a tube well is known as