Find the angle

Geometry Level 4


The answer is 70.

Aly Ahmed by Aly Ahmed , 34, Egypt

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1 solution

Ahmad Saad
Jul 15, 2017

2 Helpful 0 Interesting 0 Brilliant 0 Confused

بارك الله فيكم مهندسنا الكبير

Aly Ahmed - 3 years, 10 months ago

@Ahmad Saad But how does your diagram show that ( A C − A B ) ( A C + A B ) = A B × B C (AC-AB)(AC+AB)=AB\times BC ?

Noel Lo - 3 years, 10 months ago

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Using Secant-Secant Power Theorem as shown in diagram.

Ahmad Saad - 3 years, 10 months ago

Nice solution sir!

Anmol Shetty - 3 years, 11 months ago

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