AC Lim's answer to chae's Secondary 3 E Maths Singapore question.
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Hope this helps
Date Posted:
1 year ago
thanku for the quick response! but may i know why is (ii) square root minus and not plus? as far as i know it’s ab^2 = ac^2 + bc^2 ( which i got the wrong answer )
Angle PCA is right angle (90°)
So PC² = PA² - AC²
Another word
PA²= PC² + AC²
So PC² = PA² - AC²
Another word
PA²= PC² + AC²
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