# What is the sum of the interior angles of a isosceles trapezoid?

The sum of the angles in any quadrilateral is

Notice how two triangles can be formed with vertices also at the trapezoid. Each triangle's interior angles have a sum of

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The sum of the interior angles of an isosceles trapezoid is 360 degrees.

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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.

- John is writing a coordinate proof for one of the properties of an isosceles triangle. He begins by assigning coordinates to two of the vertices of an isosceles triangle. What coordinates should he assign to the third vertex of the isosceles triangle?
- If the sum of the interior angles of a polygon is 720°, what type of polygon is it?
- What is the measure of each exterior angle of a regular 15-sided polygon?
- How do you bisect an acute angle?
- How would you describe the angles and sides of an acute, isosceles triangle?

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