Question

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Answer 1

1. A quadrilateral is a four sided figure having 4 straight lines For ex a square rectangle trapezium etc
2. ABCD is a quadrilateral with four sides namely AB, BC, CD and DA.

It has four vertices namely A, B, C and D. The angle between two adjacent sides is an angle of the quadrilateral. So, a quadrilateral has four angles that is, ∠DAB, ∠ABC, ∠BCD and ∠CDA.

A line segment joining a pair of opposite vertices is called a diagonal. So, there are two diagonals namely AC and BD.

3. there are 2 common propertise

• a quadilateral must be an enclosed figure
• the sum of all internal angles should be 360 degrees

4. ans for q 4 is in the attachment

Hope this helps