Mathematics

A quadrilateral ABCD is a trapezium if:

  1. AB = DC

  2. AD = BC

  3. ∠A + ∠C = 180°

  4. ∠B + ∠C = 180°

Rectilinear Figures

1 Like

Answer

In a trapezium the sum of co-interior adjacent angles = 180°.

From figure,

A quadrilateral ABCD is a trapezium if: Concise Mathematics Solutions ICSE Class 9.

∠B and ∠C are adjacent angles.

∴ ∠B + ∠C = 180°

Hence, option 4 is the correct option.

Answered By

1 Like


Related Questions