Question

In ΔQRS, q = 1.2 cm, r = 9.7 cm and s=9.2 cm. Find the measure of ∠Q to the nearest degree.

Answer 1

\[\cos Q=\frac{ 9.7^2+9.2^2-1.2^2 }{ 2\times 9.7 \times 9.2 }\]
\[\cos Q=\frac{ 94.09+84.64-1.44 }{ 178.48}\]
\[\cos Q=\frac{ 177.24 }{ 178.48 }\]
\[Q=\cos ^{-1}(\frac{ 177.24 }{ 178.48})\approx 6.76^\circ \approx 7 ^\circ \]

Answer 2

the drawing is insane