Answer:
4,8,9 is not a right triangle
Step-by-step explanation:
A right angled triangle
a right angled triangle makes use of the following equation
c^2 = a^2 + b^2
the values given are 4,8,9
c would be 4
a and b would be e and 9
put these values in the equation
4^2 = 8^2 + 9^2
16 = 145
hence the side lengths 4,8,9 is not a right triangle
