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Lady bird [3.3K]
3 years ago
7

What is the value of a?

Mathematics
2 answers:
Helen [10]3 years ago
7 0
25 ² - 20 ² = a
625 - 400 = 225
a = 225
a = 15
ohaa [14]3 years ago
6 0

Answer:

15

Step-by-step explanation:

a²+20²=25²

a²=625-400

a²=225

a=15

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