# Solve the riddle: I am a polygon. I have two right angles. I have only one pair of parallel sides. What am I?

A trapezoid, or any number of other polygons.

A trapezoid is the polygon with the fewest sides fitting the criteria, however there are multiple polygons which suffice (since it was not specified that the polygon must be regular).

A few examples should show how to generate a polygon with any number of sides what has two right angles and a single pair of parallel sides.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- How do you write the degree measure over 360 to find the fraction of the circle given #45^circ#?
- How many acute angles can a quadrilateral have?
- If angle A and B are complementary and #A=5x+8# and #B=x+4#, what are the measurements of each angle?
- A triangle has two corners of angles #pi /8# and #(7pi)/12 #. What are the complement and supplement of the third corner?
- What is the measure of an angle whose measure is 50 more than the measure of its complement?

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