How to find the area of an oblique triangle

Why can't the standard area formula for triangles be used in this scenario?

• The triangle is not a right triangle.

• The height is unknown.

• The base is unknown.

• The angle is unknown.

What is the formula for the area of an oblique triangle?

• 1/2 base times height

• 1/2 a * c * sin(B)

• 1/2 a * b * sin(A)

• 1/2 a * b * sin(C)

How can the oblique triangle formula be adapted when angle B is known?

• Use 1/2 a * b * sin(C)

• Use 1/2 b * c * sin(A)

• Use 1/2 a * c * sin(B)

• Use 1/2 a * b * sin(A)

What is the value of angle B used in the calculation example?

• 150 degrees

• 120 degrees

• 90 degrees

• 130 degrees

What is the calculated area of the triangle in the example?

• 474.95 square units

• 450 square units

• 500 square units

• 480 square units