Answer:
168 cm²
Explanation:
The shaded area is equal to the area of the rectangle after subtracting the area of the triangle. The relevant area formulas are ...
A = LW . . . . rectangle area is the product of length and width
A = 1/2bh . . . triangle area is half the product of the base and height
__
The rectangle area is ...
A = (15 cm)(14 cm) = 210 cm²
The triangle area is ...
A = 1/2(14 cm)(6 cm) = 42 cm²
The shaded area is ...
rectangle area - triangle area
= 210 cm² -42 cm² = 168 cm² . . . . shaded area