Review of Law of Sines & Law of Cosines

The law of sines is used to solve right triangles.

• True

• False

Answer explanation

Law of sines is for Oblique (non-right) triangles.

Which of the following formulas show the law of cosines?

• 9285.73 ft

• 96.36 ft

• 24061.81 ft

• 155.12 ft

• 41.7

• 51.7

• 61.7

• 71.7

What are the possible criteria for law of sines?

• SSA, ASA, AAS

• AAS, SSS, ASA

• SAS, SSS, ASA

• SAS, AAS, ASA

Parker must find the distance from Point A to Point B on opposite sides of a lake.  He locates Point C that is 860 feet from point A and 175 feet from Point B.  He measures the angle at Point C to be 78 degrees.  Find the distance from point A to point B.

• 707643.58

• 841.22

• 877.62

• 842.01

• Law of Sines

• Law of Cosines

• Law of Mrs.Ciprich

• Law of Trig

Amanda and Jamie are standing 25 feet apart and spot a bird in the sky between them. The angle of elevation from Amanda to the bird is 55 degrees, and from Jamie to the bird is 63 degrees. How far away, to 2 decimal places, is the bird from Amanda?

• 25.23 ft

• 23.19 ft

• 22.15 ft

• 20.85 ft

Two stakes are holding a small blimp in place. Stake A measures an angle of elevation of 49^o and Stake B measures an angle of elevation of 58^o. If the string attached to Stake A has a length of 148 feet, what is the length of the string attached to Stake B?

• 152.7 feet

• 166.3 feet

• 157.3 feet

• 131.7 feet

Find the measure of ∠A

• 18

• 28

• 25

• 24