3 years ago

Help Please!! What is the value of a? Enter your answer in the box. a =

Mathematics

1 answer:

Talja [164]3 years ago

6 0

Answer:

a=15

Step-by-step explanation:

By pythagoras' theorem

25²=20²+a²

625=400+a² group like terms

a²=625-400

a²=225

$\sqrt{a {}^{2} } = \sqrt{225}$

therefore a=15

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