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

Degrees in a triangle: 180
Angles In A triangle: 3
Degrees in a Right Angle: 90
Degrees in any given angle: 0< must be greater than 0.
If you have two right angles, that is 180.  Your third angle would then HAVE to be 0 degrees, but that is impossible.

anonymous · Answer

The sum of a triangles internal angles is 180, you have 3 internal angles (tri-angle) so if the both are 90 you'll have 180 and still be missing one internal angle