Answer ASAP please!
Which of the following statements is not true?


A. Pythagoras' can be used to find an unknown angle of a right-angle triangle
B. Pythagoras' theorem can be used to find an unknown side length of a right-angle triangle

C. Pythagoras' theorem can only be used on right-angle triangles

D. Trigonometry can be used to find an unknown angle of a right-angle triangle

E. Trigonometry can be used to find an unknow side length of a right-angle triangle