How to find the area of an oblique triangle

The video tutorial explains how to find the area of a triangle using the formula involving two side lengths and the sine of the included angle. The instructor begins by visualizing the triangle and converting angle measurements to decimal form. The calculation process is demonstrated step-by-step, emphasizing the importance of understanding the formula's components. The lesson concludes with a brief mention of homework, reinforcing the concepts covered.

What is the first step in solving the problem of finding the area of a triangle?

• Converting angle measurements to decimal form

• Drawing the triangle

• Identifying the side lengths

• Calculating the sine of the angle

How do you calculate the area of a triangle using two sides and an angle?

• Subtract the angle from the sum of the sides

• Multiply the two sides and the sine of the angle, then divide by 2

• Add the two sides and multiply by the angle

• Multiply the two sides and divide by the angle

In the example given, what is the value of angle A in decimal form?

• 5.25 degrees

• 5.75 degrees

• 5.15 degrees

• 5.5 degrees

Which of the following is NOT a valid combination for using the area formula?

• Two sides and the angle opposite one of them

• Two sides and the angle between them

• Two angles and the included side

• Two sides and the included angle

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

• 6.5293

• 5.5293

• 4.5293

• 7.5293