Final answer:
c) 10.5 cm. The length of YZ is 10.5 cm.
Step-by-step explanation:
To find the length of YZ, we can use the formula for the area of a triangle: Area = (1/2) * base * height. In this case, the base is XY and the height is the length of YZ. We are given that the area of angle XYZ is 35 cm², so we can set up the equation as: 35 = (1/2) * 7 * YZ. Solving for YZ, we get YZ = 10.5 cm.