Thickness of Strata by Graphical Method

Two dimensional profile of a geological structure is shown

Determine the angle of dip
If the contour lines are at very large distance to each other, this indicates a ____slope
The distance measured perpendicular to the upper and lower contact of a tabular unit
The distance on the map between the bounding contacts of a tabular unit measured along an azimuth perpendicular to strike
Geologic graphics help determination of the geology of an area comprising of the rock formations, their thickness and sequence above or below the ground surface. (Say True or False)