Help with math please:)))))

63 un²

Step-by-step explanation

Formula for Triangle = 1/2(b*h)

Lets input our numbers

b(base) = 21

h(height) = 6

Lets multiply

1/2(6 x 21) =

1/2(126) = 63

Now add the units

63 un²

you have to find the degree of the angle for each letter or variable

i hope this helped if it did gave me the brainliest answer  

thanks :) ;)