Right Triangle Solution: Find Side X Using 8 and 17 Units

888XXX171717

What is the length of the side marked X?

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Step-by-step video solution

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00:00 Find the length of side X
00:03 The triangle is right-angled, therefore we'll use the Pythagorean theorem
00:09 The sum of squares of the legs equals the square of the hypotenuse
00:12 We'll substitute the appropriate values according to the given data and solve for X
00:15 We'll isolate X
00:31 We'll take the square root
00:37 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

888XXX171717

What is the length of the side marked X?

2

Step-by-step solution

We use the Pythagorean theorem:

AB2+BC2=AC2 AB^2+BC^2=AC^2

3

Final Answer

15 15

Practice Quiz

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Consider a right-angled triangle, AB = 8 cm and AC = 6 cm.
Calculate the length of side BC.

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