see the figure below to better understand the problem
step 1
Find out the value of c
Applying the Pythagorean Theorem
[tex]\begin{gathered} c^2=a^2+b^2 \\ c^2=1.22^2+19.3^2 \\ c=19.34 \end{gathered}[/tex]
step 2
Find the measure of angle A
[tex]\begin{gathered} tanA=\frac{1.22}{19.3} \\ A=3.6^o \end{gathered}[/tex]
step 3
Find out the measure of angle B
Remember that
A+B+C=180 degrees
A=3.6
C=90
substitute
3.6+B+90=180
B=180-93.6
B=86.4 degrees
therefore
c=19.34
A=3.6 degrees
B=86.4 degrees
