Ursula could have drawn a pentagon because all angles of a pentagon are obtuse angles.
What is an obtuse angle?
An angle greater than 90° is called an obtuse angle.
Trapezoid: A quadrilateral with at least one pair of parallel sides is called
a trapezoid.
In a trapezoid, all the angles are not greater than 90° i.e. all the angles are not obtuse angles.
Similarly, In triangles and parallelograms, all the angles are not obtuse angles.
Pentagon: In a pentagon, all angles are greater than 90° i.e. obtuse angles.
Hence, Ursula could have drawn a pentagon because all angles of a pentagon are obtuse angles.
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