UKMT Pink Kangaroo, 2019

Geometry Difficulty 2.0 Junior Find the answer United Kingdom

Two angles are marked on the $3 \times 3$ grid of squares. Which of the following statements about the angles is correct?

(A) $\alpha = \beta$ (B) $2\alpha + \beta = 90$ (C) $\alpha + \beta = 60$ (D) $2\beta + \alpha = 90$ (E) $\alpha + \beta = 45$

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