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UKMT Junior Mathematical Challenge, 2024

Geometry Difficulty 2.0 Junior Find the answer United Kingdom

In the diagram shown, $PQRS$ is a rhombus and $PQT$ is an isosceles triangle in which $PT = QT$ . Angle $PSR = 110^\circ$ . What is the size of angle $SQT$ ?

(A) $5^\circ$ (B) $10^\circ$ (C) $12.5^\circ$ (D) $15^\circ$ (E) $20^\circ$

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