501 Geometry Questions

CPCTC

This isn’t only a fun group of letters to say as quickly as you can, but it is a
useful acronym to remember that Corresponding Parts of Congruent
Triangles are Congruent. This fact is valuable when you are only given
the namesof two triangles without an illustration of them. Based on our dis-
cussion above on naming congruent triangles, you can identify congruent
angles and sides by just using the triangles’ names:

If ΔTOYΔCAR, then you know that the following congruencies are true:

∠T∠C

∠O∠A

∠Y∠R

and

TOCA

OYAR

YTRC

B

A C

1.5

1.4 1.4

0.75

30 °^70 °

30 °

80 °

0.75 80 °

R

S

Q

1.5

70 °