Mathematics
If the angles of a quadrilateral, taken in order, are in the ratio 1 : 2 : 3 : 4, prove that it is a trapezium.
Related Questions
If two angles of a quadrilateral are 40° and 110° and the other two are in the ratio 3 : 4, find these angles.
If an angle of a parallelogram is two-thirds of its adjacent angle, find the angles of the parallelogram.
In the figure (1) given below, ABCD is a parallelogram in which ∠DAB = 70°, ∠DBC = 80°. Calculate angles CDB and ADB.
In figure (2) given below, ABCD is a parallelogram. Find the angles of △AOD.