1. Solve each triangle completely. Find all possible triangles when faced with the ambiguous case. a) ∆DEF: mD = 35° d = 12 mF = 70°
b) ∆ABC: a=5 b=7 c = 10
c) ∆PQR: mR = 42°12′05″ mP = 90° q = 16.7
d) ∆RST: mR = 10° s = 12 r=4
e) ∆JKL: mJ = 43°05′ k = 21 l = 39
f) ∆XYZ: mZ = 71° y = 4.4 z = 3.1
b)
c)
2. Find the area of each triangle. a)
8
5
12 100
10
d)
e)
15
f)
10
35
9
15
123 563
25 11
25
g)
h)
i) 7.6
35
3.9 5.3 8.2
16
105
3. Use your knowledge of triangles to answer the following questions. a) You are working for NASA on a project to send scientific equipment to Mars. At their closest point, Earth and Mars are 36 million miles apart. Due to a rounding error, you launch the rocket 1 degree different from the intended trajectory. After the rocket has traveled 40 million miles (and clearly not hit the planet), how far away from Mars will it be? How long do you think NASA will continue to pay you if you miss planets by this much? b) A ship travels at a bearing of N25°E for 1500 miles. It then changes course to S47°E for 650 miles. How far from its port of origin is the ship? What bearing would the ship need to take to return to port? c) You work in the packaging science department of a toy manufacturer. A certain package is in the shape of a triangular prism. The side lengths of the base of the prism are 10 cm, 8 cm, and 5 cm. (i) If the height of the package is 12 cm, what is the volume of the package? (ii) How tall would the package need to be in order to have an interior volume of 500 cubic cm? d) A regular pentagon is inscribed in a circle of radius 9″. What is the area of the pentagon?
different from the intended trajectory. After the rocket has traveled 40 million miles (and clearly not hit. the planet), how far away from Mars will it be? How long do ...
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