Digital SAT Math Test 4 Question 11

The lengths of the two legs of a right triangle $PQR$ are given. Triangle $PQR$ is similar to $STU$, where $P$ corresponds to $S$ and $Q$ corresponds to $T$. What is the value of $sin(U)$?
$$PQ=7$$
$$QR=24$$
Answer:
B

Explanation

The correct answer is Choice B.

Draw the triangle $PQR$ and find $sin⁡(R)$ which is equal to $sin⁡(U)$ due to similarity of triangle $STU$.

Choice A is incorrect and may result from finding $tan⁡(U)$, instead of $sin⁡(U)$.

Choice C is incorrect and may result from finding $cos⁡(U)$, instead of $sin⁡(U)$.

Choice D is incorrect and may result from finding $tan⁡(S)$, instead of $sin⁡(U)$.

✨ Expert's Tip ✨

The dimensions of similar triangles are not always the same, but the ratio of the side lengths is the same. Also, all the internal angles are identical.

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