Question

Use three or more sentence to explain why a triangle can not have a right angle and an obtuse angle.

Answer 1

sum of 3 angles of a triangle is 180

Answer 2

if one angle is 90 degree

Answer 3

in a triangle all angle would equal up to be 180 degrees. If you were to add an obtuse angle, more than 90 degrees, to a right angle 90 degrees, the sum would equal to be more than 180 degrees. This proves that an obtuse and a right angle cannot be in the same triangle.

Answer 4

sum of 3 angles of a triangle is 180