Question

are also adjacent. Identify other pairs of adjacent ang
DO THIS
Take cut-outs of two identical parallelograms, say ABCD and A'B'C'D' (Fig 3.19).
C'
D
C
D'
T
А
B
A'
B'
Fig 3.19
Here AB is same as A'B' except for the name. Similarly the other corresponding
sides are equal too.
Place A'B' over DC.Do they coincide? What can you now say about the lengths
AB and DC?
Similarly examine the lengths AD and BC . What do you find?
You may also arrive at this result by measuring AB and DC.
Property: The opposite sides of a parallelogram are of equal length.
TRY THESE
Take two identical set squares with angles 30° -60°-90°​

Answer 1

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