Question

A right triangle cannot have an angle​

Answer 1

Answer:

false

Explanation:

A right triangle has one 90 degree angle and the remaining 2 are acute angles

Answer 2

the Q is "a triangle can't have an angle and obtuse angle"

Answer:

It would violate the theorem of the sum of the interior angles of a triangle summing up to

180°.

Explanation:

We know that sum of all interior angles of a triangle is 180∘ ---(1)

If we assume that one angle is right angle of

90∘ and other angle be obtuse angle of x such that x>90∘ .

Sum of the 2 angles is then

90+x>180∘.

It cannot be possible due to equation (1). (Contradiction).

Therefore,

our initial assumption of

x>90∘is incorrect and so the statement is false by the method of indirect proof