CBSE Class 9 Answered
Prove that it in a quadrilateral each pair of opposite angles are equal them it is a paralleogram
Asked by chandininayak86 | 15 Dec, 2023, 07:36: AM
Let ABCD is quadrilateral .
A =
C =
B =
D = β
sum of all four abgles = 2 (α + β ) = 360
Hence (α + β ) = 180
If lines AD and BC are intersected by line AB and sum of interior angles A and
B is 180 (
(α + β ) = 180 ) ,
then AD || BC .
Similarly , If lines AB and CD are intersected by line AD and sum of interior angles A and
D is 180 (
(α + β ) = 180 ) ,
then AB || CD .
Opposite sides are parallel to each other in quadrilateral ABCD if opposite angles are equal .
Hence ABCD is parallelogram .
Answered by Thiyagarajan K | 15 Dec, 2023, 09:05: AM
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