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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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Topic review (newest first)

Harold
2012-10-24 21:08:27

Thank you,but i can do matrix multiplication and i have got my answer.

bob bundy
2012-10-24 20:54:52

hi Harold,

Can you do matrix multiplication?

The matrix


multiplied by your coordinates written as vectors:



will do the trick.

MathsIsFun has a matrix calculator at

http://www.mathsisfun.com/algebra/matri … lator.html

Choose option AB.
Bob

Harold
2012-10-24 20:48:05

Suppose I have a triangle with coordinates (1,1),(3,1),(2,2) and I want to rotate them 80 degrees so that they stay at same distance from origin,what will be the rotated triangle's coordinates?how do I find them?

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