Card 1 of 8
MediumStudy card 1
Prompt
What is true of vertical angles?
Answer
Opposite angles formed by intersecting lines have equal measures.
MathGeometry & Trigonometry
Flashcards
Lines, Angles and Triangles Flashcards
Recall angle relationships, triangle facts, similarity, and diagram traps.
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Session progress0 of 8 studied
Card 1 of 8. Answer hidden.
Card 2 of 8
MediumStudy card 2
Prompt
What is a linear pair?
Answer
Adjacent angles whose nonshared sides form a straight line; their measures sum to 180°.
Card 3 of 8
MediumStudy card 3
Prompt
With parallel lines, what is true of corresponding angles?
Answer
They are congruent.
Card 4 of 8
EasyStudy card 4
Prompt
What is the sum of a triangle’s interior angles?
Answer
180°.
Card 5 of 8
MediumStudy card 5
Prompt
What does a triangle exterior angle equal?
Answer
The sum of the two remote interior angles.
Card 6 of 8
MediumStudy card 6
Prompt
What side-angle relationship holds in an isosceles triangle?
Answer
Equal sides are opposite equal angles, and equal angles are opposite equal sides.
Card 7 of 8
MediumStudy card 7
Prompt
What do similar triangles preserve?
Answer
Corresponding angles are equal and corresponding side lengths share one scale factor.
Card 8 of 8
MediumStudy card 8
Prompt
What is the not-drawn-to-scale trap?
Answer
Assuming lines are parallel, angles are equal, or a figure is symmetric from appearance alone.
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