Question

the digonal of a square of side 10cm is
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Answer 1

Answer:

Since every side is 10 cm, when you draw a diagonal, it's a line segment opposite to 90° angle (the hypotenuse), and forms 2 isoceles right-angled triangles.

So, use the Pythagoras theorem:

10^2 + 10^2 = (hyp)^2

=> hyp = sqrt(200)

= sqrt(2 × 100)

= 10 × sqrt(2)

= 10×1.414

= 14.14 cm

Hope this helped.