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How many times is: FG longer than BC? EF longer than AB? JK

Mathematics

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Here are the solutions to your questions:

  1. Determine the side lengths of the triangles.

    From the grid:
    For △\triangleABC:

    • Length of AB = 2 units
    • Length of BC = 3 units
    • Length of AC = 22+32=4+9=13\sqrt{2^2 + 3^2} = \sqrt{4+9} = \sqrt{13} units

    For △\triangleEFG:

    • Length of EF = 4 units
    • Length of FG = 6 units
    • Length of EG = 42+62=16+36=52=213\sqrt{4^2 + 6^2} = \sqrt{16+36} = \sqrt{52} = 2\sqrt{13} units
  2. Answer 3.1.1.

    The question asks: "How many times is FG longer than BC?"

    FGBC=63=2\frac{\text{FG}}{\text{BC}} = \frac{6}{3} = 2

    FG is 2 times longer than BC.
    The answer is: 2 times\boxed{\text{2 times}}

  3. Answer 3.1.2.

    The question is structured as "JK ______ shorter than BC?". The word "shorter" is already provided. This implies we need to identify a side that is shorter than BC.
    Length of BC = 3 units.
    Looking at the sides of △\triangleABC, AB has a length of 2 units.
    Since 2<32 < 3, AB is shorter than BC.
    The answer is: AB\boxed{\text{AB}}

  4. Answer 3.1.3.

    The question asks: "EF longer than AB?"

    EFAB=42=2\frac{\text{EF}}{\text{AB}} = \frac{4}{2} = 2

    EF is 2 times longer than AB.
    The answer is: 2 times\boxed{\text{2 times}}

  5. Answer 3.1.4.

    The question is structured as "IJ ______ shorter than AB?". The word "shorter" is already provided. This implies we need to identify a side that is shorter than AB.
    Length of AB = 2 units.
    Looking at all sides in both triangles:

    • AB = 2 units
    • BC = 3 units
    • AC = 13≈3.6\sqrt{13} \approx 3.6 units
    • EF = 4 units
    • FG = 6 units
    • EG = 213≈7.22\sqrt{13} \approx 7.2 units There is no side in either triangle that is shorter than AB. The answer is: No side\boxed{\text{No side}}
  6. Answer 3.1.5.

    The question asks: "Is △\triangleEFG an enlargement of △\triangleABC? Explain your answer."
    To determine if △\triangleEFG is an enlargement of △\triangleABC, we compare the ratios of their corresponding sides:

    EFAB=42=2\frac{\text{EF}}{\text{AB}} = \frac{4}{2} = 2 FGBC=63=2\frac{\text{FG}}{\text{BC}} = \frac{6}{3} = 2 EGAC=21313=2\frac{\text{EG}}{\text{AC}} = \frac{2\sqrt{13}}{\sqrt{13}} = 2

    Since the ratios of all corresponding sides are equal (the scale factor is 2), △\triangleEFG is an enlargement of △\triangleABC.
    The answer is:
    Yes, △EFG is an enlargement of △ABC. All corresponding sides are in the same ratio (scale factor of 2).\boxed{\text{Yes, } \triangle\text{EFG is an enlargement of } \triangle\text{ABC. All corresponding sides are in the same ratio (scale factor of 2).}}

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