Ad=10.4cm , formula: a=1/2bh base=12 height = 10.4 solve, and give steps

62.4 cm^2

To find the Area (A) of triangle ABC, one must know the length of the base
(b) and of the height (h).

Using the equation A=1/2bh, the first thing to do is to substitute in the values for variables b and h, then just multiplying.

A=1/2 x 10.4 x 12
A=1/2 x 124.8
A= 62.4

You have got to take a better picture. i can't you if i can't see what i'm trying to you with.. okay.