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Study these flashcards

Josh N.

• 12

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Interior Angle Sum Theorem

If a convex polygon has *n* sides and *S *is the sum of the measures of its interior angles, then *S *= 180(*n *− 2).

Exterior Angle Sum Theorem

If a polygon is convex, then the sum of the measures of the exterior angles, one at each vertex, is 360.

Parallelogram

A quadrilateral with parallel opposite sides.

Properties of a Parallelogram

- opposit sides are congruent
- opposite angles are congruent
- consecutive angles are supplemantary

If a parallelogram has one right angle, what does this mean?

It has all right angles.

Properties of a Parallelogram's Diagonals

- they bisect each other
- seperates the quadrilateral into two congruent triangles

Tests For Parallelograms

Polygon

How does one tell if a shape is concave or convex?

12-sided figure

Regular polygon

Diagonal

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