The length of QR is 8 cm and the length of BC is 37.5 cm
What are congruent triangles?
Triangles that are precisely the same size and shape are known as congruent triangles. Stated differently, two triangles are congruent if and only if their corresponding sides and angles have equal measures.
The term "congruent" is used to describe the relationship between these triangles, and it implies that one triangle can be superimposed onto the other by a combination of translations, rotations, and reflections.
Example 1
QR/PR= RS/RT
QR/4 = 6/3
QR = 4 * 6/3
= 8 cm
Example 2
BC/DE = AC/CE
BC/25 = 15/10
BC = 25 * 15/10
BC = 37.5