Prove the following theorem indirectly. We will give you a start.

Prove that a triangle cannot have two right angles.
A triangle cannot have two right angles. Suppose a triangle had two right angles.

Question

Prove the following theorem indirectly. We will give you a start.

Prove that a triangle cannot have two right angles.
A triangle cannot have two right angles. Suppose a triangle had two right angles.

anonymous · Answer

if a triangle will have two right angles then the two sides of the triangle will be parallel to each other And if two sides of a triangle will be parallel to each other than it will not be a triangle.|dw:1342801549724:dw|

anonymous · Answer

Thank you very much that helped a lot :)

across · Answer

I'm sorry to hijack your question, but this exercise brings up an interesting case study:

Given the following isosceles triangle,

|dw:1342801703803:dw|

what is the limit of $\theta$ as $a\to\infty$?