Chapter 7 - Applications of Trigonometry and Vectors - Section 7.2 The Ambiguous Case of the Law of Sines - 7.2 Exercises - Page 312: 43a

The area of the red upper stripe is $8.77~in^2$

The length of the red upper stripe is $11.4 ~in$ The width of the red upper stripe is $\frac{10~in}{13}$ We can find the area of the red upper stripe: $Area = (11.4 ~in)(\frac{10~in}{13})$ $Area = 8.77~in^2$ The area of the red upper stripe is $8.77~in^2$