Respuesta :
Answer:
it is easy use the formula of triangle which is 1/2(base × height) and base is the side where the height touches and height means the perpendicular line.
And in some cases there may be the use of pythagoras theorem
Answer:
1/2 (9)3.1 = 13.95
1/2 (6)5.5 = 16.5
1/2 (12)4.4 = 26.4
1/2 (4)6.7 = 13.4