# Both pairs of base angles of an isosceles trapezium are congruent.
# Both pairs of base angles of an isosceles trapezium are congruent.
# Pairs of angles in an isosceles trapezium that do not share a base are supplementary.
# Pairs of angles in an isosceles trapezium that do not share a base are supplementary.
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# Area of isosceles trapezium is given by<math>(a+b)/2 X h</math> , where a and b are the lengths of the parallel sides and h is the distance (height) between the parallel sides.
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# Area of isosceles trapezium is given by<math>(a+b)/2 x h</math> , where a and b are the lengths of the parallel sides and h is the distance (height) between the parallel sides.