Question 535515
The altitude of the triangle bisects the base of an isoscles triangle.
When you draw a line from the opposite vetex to the base  2 congruent triangles are formed by the height.
Total base = 16
half the base = 8 
the angle = 10.5

Find the height of the triangle by tan value

Tan {{{theta}}}= height /base

Tan (10.5) = height / 8

8 * tan 10.5= height
height = 1.48

Area = 1/2 * 16 * 1.48

Area = 11.84 sq. units