Triangles ABC is right angled at B and D is a point of BC such that BD = 5 cm, AD = 13 cm, and AC = 37 cm, then find the length of DC in cm.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 30
Triangle ABC is a right-angled triangle at B.
BD = 5 cm
AD = 13 cm
AC = 37 cm
ABD is also a right-angled triangle.
AB2 + BD2 = AD2
AB2 = 169 - 25
AB = 12
AB2 + BC2 = AC2
BC2 = AC2 - AB2
BC2 = 372 - 122
BC = 35
BD + DC = 35
DC = 30