# geometry

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if i know one angle between the diagonals at intersecting point , how can i find the angle between the sides and the diagonal?

• Is this a rectangle? -

If it is a rectangle then you have 4 isoceles triangles
T + 2 A = 180
where T is your given angles and A is your two angles at the sides. In the other two triangles the angle you want is 90-A

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