Q1
Sum of angles in a quadrilateral is:
📝 SolutionAny quadrilateral = 2 triangles = 2×180° = 360° angle sum.
Q2
A parallelogram is a quadrilateral with:
📝 SolutionParallelogram: both pairs of opposite sides parallel. Properties: opposite sides equal, opposite angles equal, consecutive angles supplementary.
Q3
Rhombus is a parallelogram with:
📝 SolutionRhombus: parallelogram with all four sides equal. Diagonals bisect at right angles but are generally not equal.
Q4
Rectangle is a parallelogram with:
📝 SolutionRectangle: parallelogram with all four angles = 90°. Diagonals are equal and bisect each other.
Q5
A trapezium has:
📝 SolutionTrapezium (trapezoid): quadrilateral with exactly one pair of parallel sides. If non-parallel sides equal, it's isosceles trapezium.
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Class 9 · Maths
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