Mathematics

solve this question. ( 3 points, P,Q,R are on a horizontal plane. point Q is on a bearing of 120° and a distance of 80m from P. Point R is on a bearing of 045°, and a distance of 150m from point Q. ¡. calculate correct to 2 significant figure the distance of P from R. ¡¡. Find the perpendicular distance from P to R. Illustrate it with a well labelled diagram.

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  1. Draw a diagram.
    (i) use the law of cosines. The distance
    PR^2 = 80^2 + 150^2 - 2*80*150 cos105°
    (ii) perpendicular to what? I suspect you want one of the altitudes of triangle PQR. From (i) you now have all 3 sides, so you can find all 3 angles using the law of sines.

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    oobleck
  2. solve this question. ( 3 points, P,Q,R are on a horizontal plane. point Q is on a bearing of 120° and a distance of 80m from P. Point R is on a bearing of 045°, and a distance of 150m from point Q. ¡. calculate correct to 2 significant figure the distance of P from R. ¡¡. Find the perpendicular distance from P to R. Illustrate it with a well labelled diagram.

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