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Quadrilaterals & Polygons 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 Quadrilaterals & Polygons flashcards as text

  1. What is the sum of interior angles of a decagon?

    Answer: 1440°

    With n=10, (10-2)×180° = 8×180° = 1440°.

  2. In a square, the diagonal relates to side s by which length?

    Answer: s√2

    The diagonal of a square equals side length times √2.

  3. Which quadrilateral is NOT always a parallelogram?

    Answer: Trapezoid

    A trapezoid has only one pair of parallel sides, so it is not a parallelogram.

  4. How many sides does a polygon have if the sum of its interior angles is 1080°?

    Answer: 8

    Solving (n-2)×180° = 1080° gives n-2 = 6, so n = 8.

  5. The opposite angles of a parallelogram are:

    Answer: Congruent

    Opposite angles in a parallelogram are always equal in measure.

  6. A regular polygon has an exterior angle of 24°. How many sides does it have?

    Answer: 15

    360° divided by 24° equals 15 sides.

  7. Which property distinguishes a square from a rhombus?

    Answer: Four right angles

    A square must have four right angles, which a general rhombus lacks.