Question: The cross section of a tunnel is the major segment of a circle of radius 12.0 ft wide. The base of the tunnel is 20.0

The cross section of a tunnel is the major segment of a circle of radius 12.0 ft wide. The base of the tunnel is 20.0 ft wide. What is the area of the cross section? See Exercise 79.

Data from Exercises 79

In Fig. 8.53, show that the area of a design label (a segment of a circle) intercepted by angle θ is A = 1/2r² (θ − sinθ). Find the area if r = 4.00 cm and θ = 1.45.

Fig. 8.53 LABEL

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