Download Lesson 8.5 – Congruent Polygons Objective: To identify and name

Lesson 8.5 – Congruent Polygons
Objective: To identify and name congruent polygons.
Congruent sides – have equal lengths.
Congruent angles – have equal measures.
The symbol
means “is congruent to.”
Corresponding parts – are in the same position in different figures.
- when naming congruent polygons, list their corresponding vertices in the same order.
Example:
How to read
“triangle JKL”
Practice:
Special rules:
Side-Side-Side
(SSS)
If three sides of one triangle are
congruent to three sides of
another triangle, then the
triangles are congruent.
Side-Angle-Side
(SAS)
If two sides and the angle
between them in one triangle are
congruent to two sides and the
angle between them in another
triangle, then the triangles are
congruent.
Angle-Side-Angle
(ASA)
If two angles and the side
between them in one triangle are
congruent to two angles and the
side between them in another
triangle, then the triangles are
congruent.
HW: P. 399 #1 - 18