Inclined joke

In a triangle, three vertices are usually represented by A, B and C, and the angle of this vertex is represented by the way.

Such as A = 30, C = 90, etc.

A, b and c represent the lengths of three sides. Note that their positions are fixed.

Namely: A is the opposite side of angle A, B is the opposite side of angle B, and C is the opposite side of angle C..

Just in case, you must not make a mistake. Make jokes when you make mistakes. So what you wrote before ∠ c = 90 is very irregular.

It should be written as ∠ c = 90, or it can be written as c = 90 directly.

Everyone abides by the above regulations.

In this question, C is the hypotenuse, and c = 17 is obtained by Pythagorean theorem.