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Year 10 Maths Advanced Geometric Figures

Basic Geometry

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Question 1
209051

Three straight lines meet at the point \(O\), as shown.

Find the value of \(a\).

Three lines crossing at OThree straight lines meet at O. Three adjacent angles above the horizontal line are 2a degrees, 70 degrees and (a + 20) degrees. 2a° 70° (a + 20)° O
\(a =\) 
30
2 marks

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