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McGraw Hill Glencoe Geometry, 2012

MH

McGraw Hill Glencoe Geometry, 2012 View details

6. Two-Dimensional Figures

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Exercise 12 Page 61

How can you check whether a polygon is convex?

Type of Polygon: Heptagon
Convex or Concave: Concave
Regular or Irregular: Irregular

Practice makes perfect

This polygon has seven sides, so it is called a heptagon. Let's draw the lines containing the sides to check whether they have points in the interior of the polygon.

Since the dashed lines have points in the interior of the polygon, we know that our polygon is concave. Because the polygon is not convex, it must be irregular.

Subchapter links

Check Your Understanding p.61

Practice and Problem Solving p.61-63

H.O.T. Problems p.63

Standardized Test Practice p.64

Spiral Review p.64

Skills Review p.64