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Oksi-84 [34.3K]
3 years ago
5

1,4,9,16 and 25 explain why these numbers sometimes are called perfect squares

Mathematics
1 answer:
sergiy2304 [10]3 years ago
3 0
A number multiplied by itself equals a perfect square therefore:
2×2=4
3×3=9
4×4=16
5×5=25
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A triangle PQR is right angled at R, with PQ=80cm and R=60cm. find QR?<br> pythagorus theorem
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Answer:

Solution given:

A triangle PQR is right angled at R, with hypotenuse{h}PQ=80cm

and

base[b]PR=60cm.

perpendicular [P]= QR

<u>by</u><u> </u><u>using</u><u> </u><u>Pythagoras</u><u> </u><u>law</u>

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QR²=80²-60²

QR=\sqrt{2800}

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