Answer:
D. 24
Explanation:
The area of a triangle is
.
The height is already given: 8
But we need to find the base and since the hypotenuse is given and it's a right triangle, we can use the pythagorean theorem. (Hypotenuse is longest, slanted side of a right triangle)
The pythagoren theorem is
where a and b are the sides, and c is the hypotenuse.
Plugging in the given values =>

We have to solve for b. So, squaring 8 and 10 we get
.
Next, subtract 64 from both sides to get b by itself:

Square root both sides to get
.
Now that we have our base we can plug it in to the area of triangle formula:
.
Multiply inside the parenthesis: 1/2(48) => 24