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Geometry Flashcards

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

Read the first 7 Geometry flashcards as text

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

    Answer: 180°

    The interior angles of any triangle always sum to exactly 180°.

  2. Two lines that lie in the same plane and never intersect are called:

    Answer: Parallel lines

    Parallel lines remain the same distance apart and never meet, no matter how far they extend.

  3. Which quadrilateral has all four sides equal in length AND all four angles equal to 90°?

    Answer: Square

    A square satisfies both conditions: four equal sides and four right angles.

  4. What is the measure of each interior angle of a regular hexagon?

    Answer: 120°

    Using the formula (n−2)×180°÷n with n=6 gives (4×180°)÷6 = 120°.

  5. An isosceles triangle is defined as a triangle with:

    Answer: Exactly two sides equal

    An isosceles triangle has exactly two sides of equal length, and the angles opposite those sides are also equal.

  6. Supplementary angles are two angles whose measures sum to:

    Answer: 180°

    Supplementary angles add up to 180°, forming a straight line when placed together.

  7. If two lines are perpendicular, the angle formed between them is:

    Answer: 90°

    Perpendicular lines intersect at a right angle, which measures exactly 90°.