Answer:
Option 1st is correct
area of a triangle is, 80 in²
Step-by-step explanation:
Area of triangle(A) is given by:
[tex]A = \frac{1}{2} b \cdot h[/tex]
where,
b is the base
h is the height or altitude of the triangle respectively.
As per the statement:
Base of a triangle(b) = 10 inches and
Height = altitude(h) = 16 inches
Substitute these in [1] we get:
[tex]A = \frac{1}{2}(10) \cdot 16[/tex]
⇒[tex]A = 5 \cdot 16 = 80[/tex]in²
Therefore, the area of a triangle is, 80 in²