Mathematics

Use ruler and compass only to construct a triangle ABP such that AB = 8 cm, BP = 5 cm and angle ABP = 30°.

(i) Complete the rhombus ABCD such that P is equidistant from AB and BC.

(ii) Locate a point Q on line BP such that Q is equidistant from A and B.

Constructions

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Answer

Steps of construction :

  1. Draw a line segment AB = 8 cm.

  2. Draw BZ such that ∠ABZ = 30°.

  3. From BZ cut off BP = 5 cm.

  4. Join AP.
    Since, P is equidistant from AB and BC, thus it will lie on the angle bisector of angle between AB and BC.
    Since, ∠ABP = 30°
    ∴ ∠ABR = 60°

  5. Draw ∠ABR = 60°.

  6. From BR cut off BC = 8 cm.

  7. With C and A as center draw arcs of 8 cm cutting each other at point D.

  8. Join CD and AD.

  9. Draw XY, the perpendicular bisector of AB.

  10. Mark point Q as the intersection point of BP and XY.

Use ruler and compass only to construct a triangle ABP such that AB = 8 cm, BP = 5 cm and angle ABP = 30°. Model Question Paper - 1, Concise Mathematics Solutions ICSE Class 10.

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