marshlac000 marshlac000

21-04-2022
Mathematics

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Please help me it's very important that this gets done asap

Please help me its very important that this gets done asap class=

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NobodyKat NobodyKat

21-04-2022

Answer:

√32 or 4√2 or 5.657 (3 d.p.)

Step-by-step explanation:

Use Pythagoras’ Theorem
d² + 7² = 9²
Evaluate the known squares
d² + 49 = 81
Subtract 49 from both sides to make d² the subject
d² = 81 - 49 = 32
d = √32 = 4√2 = 5.657 (3 d.p.)

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