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Question 11 Mark
Take two triangular pieces of paper such that . one side of one triangle is equal to one side of the other. Let us suppose that in ∆ABC and ∆PQR, sides AC and PQ are the equal sides. Join the triangles so that their equal sides lie B side by side. What figure do we get?

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Answer
If we place the triangles together such that the equal sides overlap, the two triangles form a quadrilateral.
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Question 21 Mark
Cut out a paper in the shape of a quadrilateral. Make folds in it that join the vertices of opposite angles. What can these folds be called?

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Answer
The folds are called diagonals of the quadrilateral.
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