UKMT Grey Kangaroo, 2024

Geometry Difficulty 2.0 Junior Find the answer United Kingdom

Three angles $\alpha^{\circ}$ , $\beta^{\circ}$ and $\gamma^{\circ}$ are marked on squared paper, as shown. What is the value of $\alpha + \beta + \gamma$ ?

(A) $60$ (B) $70$ (C) $75$ (D) $90$ (E) $120$

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