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Quadrilateral Flashcards

7 cards from real Geometry practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Quadrilateral flashcards as text

  1. Consecutive angles in a parallelogram are always:

    Answer: Supplementary

    Consecutive (adjacent) angles of a parallelogram add to 180°, making them supplementary.

  2. A square has a diagonal of 10 cm. What is the length of each side (rounded)?

    Answer: 7.07 cm

    Side = diagonal ÷ √2 = 10 ÷ 1.414 ≈ 7.07 cm.

  3. An isosceles trapezoid is distinguished by having:

    Answer: Congruent legs and equal base angles

    An isosceles trapezoid has congruent non-parallel sides and equal base angles.

  4. If a quadrilateral has both pairs of opposite sides equal, it must be a:

    Answer: Parallelogram

    Both pairs of opposite sides being equal is a sufficient condition for a parallelogram.

  5. The area of a square is 81 cm². What is its perimeter?

    Answer: 36 cm

    The side is √81 = 9 cm, so the perimeter is 4 × 9 = 36 cm.

  6. Which quadrilateral can be concave (have an interior angle greater than 180°)?

    Answer: A general quadrilateral

    A general quadrilateral may be concave, while parallelograms, rectangles, and squares are always convex.

  7. A rectangle has a length of 12 m and width of 5 m. What is the length of its diagonal?

    Answer: 13 m

    By the Pythagorean theorem, √(12²+5²) = √169 = 13 m.