Question

Find the missing length. The triangles in each pair are similar.

5)
14
D
?
90
B

Answer 1

UD = 20

Explanation:

Since the triangles CBD and TUD are similar, the ratio of BD and CD is the same as the ratio of UD and TD.

UD/TD = BD/CD

UD/14 = 90/63

UD = 14 x 90 / 63

UD = 20