Angles and Directions
The magnetic bearing of line AB was recorded as S43°30'E in 1888. If the magnetic declination was 2°00'E, what is the astronomic bearing of the line? If the declination is now 3°00'W, what is the magnetic bearing of the line today?
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Additional board-style practice items for this topic.
A four-sided tract ABCD is surveyed from internal point P. PA = 420.35 m, PB = 530.15 m, PC = 480.75 m, PD = 695.10 m. Angles APB = 78.5°, BPC = 72°, CPD = 130.25°. Find the area in hectares.
Given a regular octagonal lot ABCDEFGH. If the bearing of side AB is N 18° W, what is the bearing of side DE?
Solution pending in psadquestions/t1126.json.
A triangular parcel ABC have the following technical description: [SIDE AB: BEARING N 60° 30' W, LENGTH 68.75 m; BC: N 80° 30' E, LENGTH 125.90 m; CA: ?, ?]. Determine the following:
The bearing of side CA.
The length of side CA.
Solution pending in psadquestions/t1133.json.
An engineer measures 280 m from point A to point C in a direction perpendicular to segment AB. At C, the angle ACB is 49°50′. How long should the bridge AB be?
The angle of elevation of the top of a tower from point A on the ground is 19.9°. Point B, 50 feet closer to the tower, has an angle of elevation of 21.8°. What is the height of the tower?
From a point Q on the ground of a square courtyard with area 160,000 square feet, the angles of elevation of three equal-height flagstaffs at three consecutive corners A, B, and C are 45°, 60°, and 60°, respectively. Find the height of each flagstaff in meters.