Question

Why a triangle cannot be obtuse and right at the same time ?

Answer 1

A triangle equals 180 degrees. A right angle is 90 degrees and an obtuse angle is 90+ degrees. Having both equals more than 180 degrees

Answer 2

A right angle triangle must have 90 degree angle
since the sum of all the angles in a triangle is 180 degrees,the sum of other two angles equals 90 degrees in a right triangle.(so those other two angles must be acute.)
In an obtuse angle, an angle must be greater than 90 degrees.
Hence,a triangle cannot be obtuse and right at the same time .