Help!!! Please help with #9

All you have to do is find out the formula for a triangle which is;
Area = 1/2 base x height
Lets fill it in!
Area = 1/2 6 x 10
LETS SOLVE!
Area = 1/2 6 x 10
6 x 10 = 60
Area = 1/2 x 60
1/2 x 1/60 = 1/120
Area = 120 because we divided 1/120 = 120