Question

What is a for the triangle shown?

Answer 1

you mean what is the measure angle <A ?

Answer 2

yeah

Answer 3

c is 90' btw

Answer 4

You mean <A ?

If you mean <A,

Then sin A = BC/AB

Sin A = 12/20

find the value of sin A and the equivalent angle from the trigonometric tables.

http://www.themathlab.com/toolbox/geometry%20stuff/trigratios.htm

Answer 5

would it b 4/5?

Answer 6

alternative :
u can use the defined of tan <A

tan<A = opposite side/ adjacent side
tan<A = 12/16
tan<A = 3/4
so, <A = tan^-1(3/4)
use the calculator :)