Math Problem Statement

Solve

Construct a quadrilateral ABCD, given that AB = 2.9 cm, BC = 4.8 cm, CD = 6.2 cm, DA = 3.5 cm, and BD = 4.5 cm.

Solution

To construct the quadrilateral ABCDABCD with the given dimensions using a ruler and compass, follow these steps carefully:

Given:

  • AB=2.9cmAB = 2.9 \, \text{cm}
  • BC=4.8cmBC = 4.8 \, \text{cm}
  • CD=6.2cmCD = 6.2 \, \text{cm}
  • DA=3.5cmDA = 3.5 \, \text{cm}
  • BD=4.5cmBD = 4.5 \, \text{cm}

Steps for Construction:

  1. Draw side ABAB:

    • Using a ruler, draw a straight line of length AB=2.9cmAB = 2.9 \, \text{cm}.
    • Label the endpoints as AA and BB.
  2. Construct arc for side BCBC:

    • Place the compass point on BB and set the compass width to 4.8cm4.8 \, \text{cm}.
    • Draw an arc above the line ABAB where the point CC will lie.
  3. Construct arc for side BDBD:

    • Now, place the compass point on BB and set it to 4.5cm4.5 \, \text{cm}.
    • Draw another arc that will intersect the previous arc.
  4. Construct arc for side DADA:

    • Set the compass to a length of 3.5cm3.5 \, \text{cm}.
    • Place the compass on AA and draw an arc where point DD will be.
  5. Find point DD:

    • With the compass still set to 4.5cm4.5 \, \text{cm}, place the compass on BB and draw an arc intersecting the arc drawn from AA in the previous step.
    • Mark this intersection point as DD.
  6. Construct arc for side CDCD:

    • Set the compass to 6.2cm6.2 \, \text{cm}, place it on CC, and draw an arc to locate point DD.
  7. Complete the quadrilateral:

    • Now, using the ruler, connect CC and DD, and then join points DD and AA to complete the quadrilateral.

After this, you should have the quadrilateral ABCDABCD with the given dimensions.

Would you like more details or any clarifications?

Further Questions:

  1. How can we verify the construction to ensure it's accurate?
  2. What are the conditions for constructing other quadrilaterals using the same method?
  3. Can you use a protractor to check any angles formed by the sides of this quadrilateral?
  4. How would this construction differ if the diagonals were provided instead of some sides?
  5. What if one of the sides were not possible to construct with the given dimensions?

Tip:

Always ensure that your compass is tight enough not to shift while drawing arcs, as even a small shift can cause errors in the construction.

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Math Problem Analysis

Mathematical Concepts

Geometry
Quadrilateral Construction
Compass and Straightedge Construction

Formulas

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Theorems

Triangle Inequality Theorem
Properties of Quadrilaterals

Suitable Grade Level

Grades 9-10