In+class+problems+4-7-09

1. The diagonals of a parallelogram bisect each other. If their lengths are 8.0 and 10 and they intersect at an angle of 20°40’, how long are the sides? 2. A triangular lot has side lengths of 16m, 26m, and 38 m. Find the measure of the largest angle of the lot. 3. Find the area of a decagon (10 sides) with radius 4.0 inscribed in a circle. 4. To determine the distance AB across a steep canyon, Megan walks 600 yd from B to another point, C. She then find that m<ACB=35 and m<CBA=106. Find AB. 5. On a ship sailing north, a woman notices that a hotel on shore has a bearing of 20. A little while later, after having sailed 40km, she observes that the bearing of the hotel is now 100. How far is the ship from the hotel?

1 .) 1.9, 8.9 2.) 128 3.) 47u^2 4.) 550 yd 5) 14km