Question

Verify the following cases by measurement:
(a) PQ + QR = PR (b) PR - PQ = QR
through images

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Answer 1

Answer:

Umm, let's draw the lines.

In the figure, you can clearly see that PQ+QR=PR and PR-PQ=QR

Let PQ=5cm. QR=4cm.Then obviously PR=5+4=9cm.

And Now, let PR be 9cm, PQ be 5cm. Then obviously QR=9-4=5cm.