3 years ago

Please help me.

Mathematics

1 answer:

andrezito [222]3 years ago

3 0

Answer:

Step-by-step explanation:

Every triangles are congruent

according to Pythagoras theorem

a²+b²=c²

3²+b²=4²

b²=4²-3²

b=√4²-3²

b=√16-9

b=√7

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