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5 cards from this section. Quick, good the night before a test.
How many sides, vertices, interior angles and diagonals does a quadrilateral have?
A diagonal joins two opposite vertices.
Three angles of a quadrilateral are 90°, 75° and 120°. Find the fourth angle.
The four angles add up to 360°.
Which statement defines a quadrilateral?
Squares are only one kind of quadrilateral.
What is the sum of the interior angles of any quadrilateral?
How many triangles does one diagonal make?
Explain why the interior angles of every quadrilateral add up to 360°.
Split the quadrilateral into two triangles with one diagonal.
In quadrilateral PQRS, ∠P = ∠R, ∠Q is twice ∠P, and ∠S = 60°. Find all four angles.
Write every angle in terms of ∠P.
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