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Triangles & Congruence 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 Triangles & Congruence flashcards as text

  1. In an isosceles triangle, the two angles opposite the equal sides are called what?

    Answer: Base angles

    The angles opposite the congruent sides are the base angles and are equal.

  2. An equilateral triangle has how many degrees in each interior angle?

    Answer: 60 degrees

    180 divided among three equal angles gives 60 degrees each.

  3. Which postulate uses two sides and the angle between them?

    Answer: SAS

    Side-Angle-Side uses two sides with the included angle.

  4. The exterior angle of a triangle equals the sum of which angles?

    Answer: The two remote interior angles

    An exterior angle equals the sum of the two non-adjacent (remote) interior angles.

  5. Triangle DEF is congruent to triangle GHI. Which side corresponds to side DE?

    Answer: GH

    Corresponding vertices in order give DE matching GH.

  6. What is the longest side of a triangle always opposite to?

    Answer: The largest angle

    In any triangle, the longest side lies opposite the largest angle.

  7. Can a triangle have sides of length 2, 3, and 6?

    Answer: No, it violates the triangle inequality

    Since 2 + 3 = 5 is less than 6, the triangle inequality fails.