Triangle abc has perimeter 22 cm. ab= 8cm bc=5cm by calculation deduce whether triangle abc is a right-angled triangle.

The perimeter is 22cm therefore the remaining side is 22-8-5=9 cm. A right triangle follows the Pythagorean theorem which states that any side is equal to the square root of the sum of the squares of the other side or A=B2+C2. Using this we can get side AB and see if we can get it using the Pythagorean theorem. 52+92=10.30 cm. therefore, triangle ABC is not a right-angled triangle

d is the correct answer

step-by-step explanation:

x= 8 because 3x = 3 * 8, and 3*8 = 24