Math challenge #3 - Find its length!

Question

(Difficulty: 2/10)

Find the length of the line segment AH.

This is actually a question from the latest public exam in Hong Kong (HKDSE, Hong Kong Diploma of Secondary Education Examination). See if you can pass the high school exam in Hong Kong! ;)


Solution

3_ans.png

Thus by the Pythagoras' Theorem AH = 10.

(In case you have no idea about the Pythagoras' Theorem, it states that in a right-angled triangle, a^2 + b^2 = c^2, where c is the length of the longest side, a and b are the other two sides.)


Previous posts

Math challenge #1 - Find the remainder!
Math challenge #2 - Find the value of these recurring square roots

H2
H3
H4
3 columns
2 columns
1 column
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