Atriangle has side lengths 15 cm, 20 cm, 36 cm. is the triangle a right triangle? show your work or explain your answer.

No, this ∆ isn't a right angled ∆

Step-by-step explanation:since,

(36)^2=1296, (20)^2=400 and (15)^2=225

Clearly (36)^2 isn't equal to (20)^2+(15)^2

Thus it is not a right angled ∆

r(0,90)(x,y) . t(-5,0)

last option

step-by-step explanation:

∆def to ∆d"e"f"

- rotate 90 counterclockwise degrees

- then translated 5 to the left (x --> x - 5)

answer is the last option