Question

What is the length of DB?A. 5B. 12C. 19D. 25

Answer 1

the sides of the triangles are,

AC = 7

CB = 18

AB = ?

AD = 6

from the law of triangle

the sum of the two sides should be more than the third side,

so,

AC + CB > AB

7 + 18 > AD +DB

25 > 6 + DB

subtract 6 from both side

25 - 6 > 6 + DB - 6

19 > DB

so, DB should be less than 19

now,

we take other two sides,

AC+AB > BC

7 + 6 +DB > 18

DB > 18 - 13

DB > 5

so DB should be greater than 5

thus, the answer is option B that is 12