Question

Guys, I am a new girl here. If you know how to solve this, please help and please don't spam. This is really important. ​

Answer 1

Answer:

AC2 =BC2+AB2

AC2= (12)2+(5)2

= 144+25

= 169

AC= 13cm

let us consider angle DBC is Φ then angle DBA will be 90-Φ.

angle A+ C= 90 as ABC is right angle triangle.

angle C= 90-angle A...... (1)

angle DBC+ angle C = 90

angle DBC= 90-angle C

angle DBC= 90-(90-angle A)

= 90-90+angleA

=angle A

angle DBC=angle A.

.....then AD= BC

AD= 5cm