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Question Number 185869 by Mingma last updated on 29/Jan/23

Answered by mr W last updated on 29/Jan/23

Commented by mr W last updated on 29/Jan/23

75°+60°+45°=180° ⇒D,E,F are collinear!

75°+60°+45°=180°⇒D,E,Farecollinear!

Answered by ajfour last updated on 29/Jan/23

E((a/2), ((a(√3))/2)) F(a+((a(√3))/2) , (a/2)) D(0,a) slope of EF=−((((√3)−1)/( (√3)+1))) slope of DE=−(2−(√3)) and they are equal!

E(a2,a32)F(a+a32,a2)D(0,a)slopeofEF=−(3−13+1)slopeofDE=−(2−3)andtheyareequal!

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