Trig
posted by BreAnne .
angle b=25 degrees, angle c=90
AB= 25
a. Find the length of side b to two decimal places.
b. Find the length of side a to two decimal places in three different ways.

Basic application of your simple rightangled triangle properties ....
AC/25 =sin25°
AB = 25sin25 = 10.57
BC/25 = cos25°
BC = 22.66
BTW, the usual convention is to label the vertices of the triangle using capitals and label the side opposite a vertex with the corresponding small letter.
e.g. For triangle ABC
C = 90° , B = 25° and c=25 
thanks! :)