How do i find the area of a triangle? my measurments are 10 base and 14 height. will insert a picture. it is number 2. explain

Area of a triangle=(base x height)/2

Data:
base=10 u                         (u=units of length)
height=14 u

Area of this triangle=(10 u x 14 u)/2=140 u² /2=70 u².

the area of this triangle would be 70 square units.