Informal Geometry: Chapter 8 Online Pre-Test

A polygon has to have

• at least two sides

• at least three sides

• four or more sides

• no sides

Tags

CCSS.2.G.A.1

which shape is not a polygon

• 
• 
• 
• 

Tags

CCSS.2.G.A.1

What is a regular polygon?

• A polygon that has 1 set of parallel sides and 1 right angle.

• A polygon that has 2 sets of parallel sides and 2 right angles.

• A polygon that has 2 right angles and 2 sides congruent.

• A polygon in which all sides and all angles are congruent.

Tags

CCSS.2.G.A.1

Convex or Concave?

• convex
• concave

Tags

CCSS.2.G.A.1

Convex or Concave?

• Convex
• Concave

Tags

CCSS.2.G.A.1

What is the sum of interior angles of a pentagon?

• 360

• 720

• 540

• 900

What is the formula for the sum of interior angles

• 180n-2

• (n+2)180

• 360/n

• (n-2)180

What is the sum of interior angles of a 15-gon

• 2160

• 2340

• 2520

• 2700

What is the formula for finding the exterior angle of a polygon?

• a + b = c

• (n-2) 180

• (n-2)180/n

What is the measure of one exterior angle of a octagon?

• 30

• 72

• 50

• 45