As shown in the figure below, point A and point B are both sides of the river, but the point B cannot be reached. How can you measure the distance between point A and point B? Design a measurement scheme .

What is the elevation at B?

W Calculate the end area of the given cross section (using sum of areas method). Use a base line of 260.000m. Keep calculations to 2 decimal points, show final answer to one decimal point. Metric: All distances are shown in meters 262.43 Distance 'A' Distance 'B' Distance 'C' Distance "D" ← 6.48 260.35 !← Distance 'C→ 2.35 Plus Calculations Subtotal → !< 264.53 Area → ← Distance 'A' 260.35 3.65 Minus Calculations drawing not to scale Subtotal →! Distance 'B'→ 262.22 Area Baseline 260.000. Total Area Total

A surveyor is surveying a piece of land records the following information. The land is a triangular shape. The surveyor measures with a total station the line from a to b is 2.3 km, and the line from c to a is 6.2 km. The measures angle between lines a-b and c-a is 72 degrees. Compute the length from b to c on the land and calculate the total length of the perimeter of the land