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Home > PC > Chapter 1 > Lesson 1.3.1 > Problem 1-98

  1. Given ΔDOG, where ∠D = 64°, ∠O = 38°, and DO = 8 inches. Homework Help ✎

    1. Draw a diagram roughly to scale.

    2. Solve the triangle completely.

    3. Calculate the area of ΔDOG.

Make a chart like the one below. It helps you quickly 'see' what needs to be figured out as well as helping you quickly find a strategy.

Determine the measure of angle G first. Then use the Law of Sines to calculate the missing side lengths.

Draw a height from vertex G ⊥ to side OD.

Using your calculation for side o and the sine function for angle D, find the height. Then use the area formula for a triangle.