WEBVTT

NOTE Neural narration; phrase times estimated within exact synthesized scene segments.

1
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Build three squares. Draw a right triangle with perpendicular sides 3

2
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and 4. Build a square on each side.

3
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Count the area. The small squares have areas 9 and 16.

4
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Together that is 25 square units.

5
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Find the long side. The square on the hypotenuse has area

6
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25. Its side is the square root of 25: 5.

7
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Check the condition. The formula applies to right triangles. The hypotenuse

8
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is always opposite the right angle.