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12 February, 10:30

Triangle E D F is shown. The length of E F is 8 and the length of D F is 5. Angle E D F is 116 degrees and angle D F E is 31 degrees.

Trigonometric area formula: Area = One-half a b sine (C)

What is the area of triangle DEF? Round to the nearest tenth of a square unit.

10.3 square units

18.0 square units

20.0 square units

20.6 square units

+4
Answers (2)
  1. 12 February, 12:33
    0
    its A

    Step-by-step explanation:

    i just took the quiz.
  2. 12 February, 13:47
    0
    10.3

    Step-by-step explanation:

    Triangle E D F is shown. The length of E F is 8 and the length of D F is 5. Angle E D F is 116 degrees and angle D F E is 31 degrees.

    Trigonometric area formula: Area = One-half a b sine (C)

    What is the area of triangle DEF? Round to the nearest tenth of a square unit.

    10.3 square units

    18.0 square units

    20.0 square units

    20.6 square units
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