Look at this triangle work out length bc​

perpendicular = 10.24 cm

Step-by-step explanation:

by pythagorus theorem,

( where, h = hypotenuse, b = base,

p = perpendicular )

so,

=》

=》

=》

=》

perpendicular = 10.24 ( root 105 )

the 2 figures are congruent bc if you reflect abcd over the y axis then over the d axis the figures overlap