CPCTC

Congruence means exact match!

When two triangles are congruent, they fit perfectly on top of each other.

Target A B C
Drag to match

Corresponding Parts

Once matched, their parts map to each other.

Tap matching side
A B C
Side AB
D E F

Find the Missing Value

Use corresponding parts to find unknown measures. Rotate to align.

Rotate to align
{{ s3.angleVal }}°
{{ s3.completed ? s3.angleVal + '°' : '?' }}
0° Rotate 360°

Formalizing CPCTC

The order of letters in the congruence statement tells you which parts match.

Complete the statement
Given:
🏆

Master of CPCTC!

You've proven that when triangles are congruent, all their corresponding sides and angles are perfectly equal.