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1 (APEX)

A triangle is formed by three lines. If the ends of two lines meet to form a right-angle (90 degrees), the third line can only form angles less than 90 degrees.

90 + 45 + 45 = 180 the three angles must total 180 degrees.

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Wiki User

∙ 13y ago
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Scotty Council

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∙ 3y ago
1 is not the answer Idt.

What else can I help you with?