Question

The area of triangle ABC is 20 square units. If angle A = 130o and b = 6, find the value of c.

Answer 1

The area (A ) of triangle ABC is 20 square units, angle A = 130^o and one side b = 6 units.

The formula for the area of Oblique Triangle :  A = 1/2 bc sin A.

20 = 1/2 * 6 * c * sin 130^o.

20 = 3 * c * 0.766.

20 = 2.298 * c.

c = 20/2.298.

c = 8.7 units.

The value of c = 8.7 units.

 

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