Corresponding parts — Grade 8 Math, what it means and where it is taught
The pieces that match up: A with D, side AB with side DE, and so on.
Taught in Grade 8 Math.
Where it is taught
What uses it later
This idea is needed for:
- CPCTC — Corresponding Parts of Congruent Triangles are Congruent — used after proving congruence.
Practise this idea
1 question in the course bank use Corresponding parts, in Triangle Congruence Proofs.
Problem 1
After proving △ ABC ≅ △ DEF, what reason lets you write ∠ B ≅ ∠ E?
Worked answer
CPCTC
B pairs with E in the correspondence.
So ∠ B ≅ ∠ E by CPCTC.