Course I Unit 8 Regular Polygons

Identify each criteria that must be met for a figure to be a regular polygon.

• A polygon is a closed plane figure composed of at least three line segments that do not cross.

• A polygon is an open plane figure composed of at least three line segments that do not cross.

• A regular polygon has congruent sides.

• A regular polygon has congruent interior angles.

• A regular polygon has congruent exterior angles.

Which polygons are Regular Polygons?

• A, E, B

• B, C, D

• A, E, F

• B, C, E

Directions: How many lines of symmetry does a square have?

• 1

• 2

• 3

• 4

How many lines of symmetry does a regular pentagon have?

• 3 lines of symmetry

• 5 lines of symmetry

• 7 lines of symmetry

• 9 lines of symmetry

Which diagram correctly draws a line of symmetry to create two congruent parts from the regular polygon?

• A

• B

• C

• D

Look at the angle: Which angle is congruent to the angle above?

• A (46°)

• B (110°)

• C

• D

Which rectangle is congruent to the one shown?

• A

• B

• C

• D

Which figures are congruent?

• Figures I, II and III

• Figures I and IV

• Figures I, II and IV

• Figures III and IV

Which two rooms in Henry's sketch appear to be congruent?

• A. Bath and Hallway

• B. Foyer and Laundry

• C. Kitchen and Bath

• D. Family Room and Kitchen

Look at the triangles: The triangles are congruent. Using the notches, correctly name the triangles in a congruence statement below. Select two answers.

• △RTI ≅ △ACB
• △ITR ≅ △ABC

• △TRI ≅ △BCA

• △ACB ≅ △RTI