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Let ∠F = x. Then, ∠E = 2x and ∠D = 45°. As we know, ∠D + ∠E + ∠F = 180° (Angle sum property) Or, 45° + 2x + x = 180° Or, 45° + 3x = 180° So, 3x = 135° Thus, x = 45°. So, ∠F = 45°. Hence, the correct option is d.
129, 160, 224, ?, 459, 634
If (3/7) of 'x' is greater than (2/11) of 'x' by 38, then determine the value of 'x'.
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