Question

find the length of a diagonal of a square with side 10cm​

Answer 1

Answer:

Step-by-step explanation:

Side of square = 10 cm

if we draw a diagonal , the square is divide into 2 right angle triangles

So in right angle triangle

we can use Pythagoras theorem

where side = base , side = height , diagonal = hypo

10² + 10² = diagonal²

100 + 100 = diagonal²

diagonal² = 200 cm

diagonal = √200 cm

= 10√2 cm

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