sat suite question viewer

Geometry and Trigonometry Difficulty: Hard

$upper R upper S equals 20$

$upper S upper T equals 48$

$upper T upper R equals 52$

The side lengths of right triangle $R S T$ are given. Triangle $R S T$ is similar to triangle $U V W$ , where $S$ corresponds to $V$ and $T$ corresponds to $W$ . What is the value of $\tan W$ ?

Back question 85 of 268 Next

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268

Explanation

Choice B is correct. It's given that right triangle $R S T$ is similar to triangle $U V W$ , where $S$ corresponds to $V$ and $T$ corresponds to $W$ . It's given that the side lengths of the right triangle $R S T$ are $upper R upper S equals 20$ , $upper S upper T equals 48$ , and $upper T upper R equals 52$ . Corresponding angles in similar triangles are equal. It follows that the measure of angle $T$ is equal to the measure of angle $W$ . The hypotenuse of a right triangle is the longest side. It follows that the hypotenuse of triangle $R S T$ is side $T R$ . The hypotenuse of a right triangle is the side opposite the right angle. Therefore, angle $S$ is a right angle. The adjacent side of an acute angle in a right triangle is the side closest to the angle that is not the hypotenuse. It follows that the adjacent side of angle $T$ is side $S T$ . The opposite side of an acute angle in a right triangle is the side across from the acute angle. It follows that the opposite side of angle $T$ is side $R S$ . The tangent of an acute angle in a right triangle is the ratio of the length of the opposite side to the length of the adjacent side. Therefore, $\tan T = \frac{R S}{S T}$ . Substituting $20$ for $R S$ and $48$ for $S T$ in this equation yields $\tan T = \frac{20}{48}$ , or $\tan T = \frac{5}{12}$ . The tangents of two acute angles with equal measures are equal. Since the measure of angle $T$ is equal to the measure of angle $W$ , it follows that $\tan T = \tan W$ . Substituting $\frac{5}{12}$ for $\tan T$ in this equation yields $\frac{5}{12} = \tan W$ . Therefore, the value of $\tan W$ is $\frac{5}{12}$ .

Choice A is incorrect. This is the value of $\sin W$ .

Choice C is incorrect. This is the value of $\cos W$ .

Choice D is incorrect. This is the value of $StartFraction 1 Over tangent upper W EndFraction$ .