# Pre-Algebra

posted by .

Can someone help me with this one-

Quadrilaterals are a special type of polygon because _______________.

A. they always have exactly four sides
B. the sum of their interior angles always measures 180°
C. they always have opposite sides that are parallel
D. they are always concave

Thanks
-MC

## Similar Questions

1. ### math

find the sum of the measures of the intieior angles of each polygon. -hexagon -pentagon -quadrilateral -octagon -16-gon -27-gon The key is the sum of the measures. All of these figures have the same total number of degrees in their …

Find the interior and exterior angle measurements of a polygon with this many sides: x=2y help?
3. ### Math

Each exterior angle of a regular polygon is 15 degrees. How many sides does the polygon have?
4. ### math

A transversal intersects two parallel lines and forms eight angles. Which of the following statements is false?
5. ### math

A transversal intersects two parallel lines and forms eight angles. Which of the following statements is false?
6. ### Geometry

What is the sum of the measures of the interior angles of a convex octagon?
7. ### Geometry

1. How many sides does a regular polygon have if one exterior angle is 90 degrees?
8. ### Algebra II

Please check my answers With two parallel lines cut by a transversal, the number of pairs of alternate interior angles is equal to the number of pairs of corresponding angles. (1 point) Always Sometimes Never *I think the answer is …
9. ### Math

Please check my answers With two parallel lines cut by a transversal, the number of pairs of alternate interior angles is equal to the number of pairs of corresponding angles. (1 point) Always Sometimes Never *I think the answer is …
10. ### Math

Are the statements Always, Sometimes or Never. Please explain why. Thanks. 1. An equilateral polygon is regular. 2. The greater the number of sides of a regular polygon, the smaller the measure of any of its exterior angle. 3. The …

More Similar Questions