Law of Cosines & Area of a Triangle

Find QR

• 34.7 km
• 2.2 km
• 13.74
• 31.1 km

Find angle T

• 62.2 degrees
• 53.1 degrees
• 59.5 degrees
• 64.7 degrees

Find XZ

• 16.004 meters
• 544.165 meters
• 34.7 meters
• 1204.165 meters

Find angle Z

• 20.145 degrees
• 71.232 degrees
• 51.055 degrees
• 57.713 degrees

Clint is building a wooden swing set for his children.  Each supporting end of the swing set is to be an A-frame constructed with two 10 foot long 4-by-4s joined at a 45 degree angle.  To prevent the swing set form tipping over, Clint wants to secure the base of each A-frame to concrete footings.  How far apart should the footings for each A-frame be?

• 5.461 feet
• 9.743 feet
• 6 feet
• 7.65 feet

The dimensions of a triangular lot are 100 feet by 50 feet by 75 feet.  If the price of such land is $3 per square foot, how much does the lot cost?

• $1815.461
• $171.163
• It's free!
• $5446.38