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Find the perimeter of $\triangle P Q R$. Round your answer to the nearest tenth if necessary. Figures are necessarily drawn to scale.

Studdy Solution
Calculate the perimeter of $\triangle PQR$ by summing the side lengths:
$$\text{Perimeter} = PQ + PR + QR$$ $$= 23.4 + 27 + 21.2$$ $$= 71.6$$
The perimeter of $\triangle PQR$ is approximately:
$$\boxed{71.6}$$