Answer:
19. x = 60
20. x= 27
Explanation:
19. Given 2 triangles are congruent
so BQ/BC = BR/BD
30/84 = x/168
84x = 30(168)
84x = 5040
x = 5040/84 = 60
20. Given 2 triangles are congruent
QS/QP = ST/PR
18/x = 10/15
10x = 18(15)
10x = 270
x = 270/10 = 27