He can either measure the third side length, apply the Pythagorean theorem to find the height of the triangle, and then calculate the area, or he can find the measure of the included angle between the known side lengths and use trigonometry to express the height of the triangle and then determine the
area of the triangle
"one" will fill both blanks.
To find the answer for this simply multiply 2.5 by 1.58
2.5 x 1.58= 3.95
So Kalani spent a total of $3.95 on oranges!