Class 7 Congruence of Two Triangles
Table of Contents
- Congruence of Triangles
- What’s Next?
In the previous segment, we had a look at congruent figures. In this segment of the chapter
of ‘Congruence of Triangles’, we will see when two triangles are congruent.
When can we say two triangles are congruent?
Consider these two triangles △ABC and △PQR
We can say these triangles are congruent, when
- length of side AB = length of side PQ
- length of side BC = length of side QR
- length of side AC = length of side PR
- m∠A = m∠P
- m∠B = m∠Q
- m∠C = m∠R
When all the three sides and angles of the two triangles are equal, then the triangles are
congruent. That is, △ABC and △PQR are congruent triangles.
△ABC ≅ △PQR
The ‘≅’ sign is used to denote congruence.