Law of Sines, Law of Cosines, & Heron's Formula

Find the exact area of the triangle

• 13.9 in²
• 13.8 in²
• 14.0 in²
• 27.9 in²

Find the exact area
of a triangle with two
sides that measure 6 yd
and 2 yd with an included
angle of 10°.

• 1.04 yd²
• 12.0 yd²
• 5.98 yd²
• 3.26 yd²

Find the area of the triangle

• 24.0 cm²
• 47.9 cm²
• 19.7 cm²
• 23.967 cm²

If you know the lengths of three sides to a triangle, what formula can you use to find an angle measure?

• Law of Sine
• Law of Cosine
• Law of Tangent
• Law of Sign

If you know the lengths of two sides and the angle between them, use this formula to find the side opposite the angle you know.

• Law of Sign
• Law of Cosine
• Law of Tangent
• Law of Sine

Find AB

• 10.03
• 8.04
• 6.10
• 4.93

Find the measure of ∠A

• 18
• 28
• 25
• 24

• 32.58
• 57.42
• 31.44
• 59.02

Find angle A

• 53.6
• 13.3
• 113.1

What is the length of side x?

• 130 cm
• 112 cm
• 150 cm
• 105 cm