Question

What is the area of this triangle ?​

Answer 1

not a triangle, but ok

19.35

Explanation:

you can cut off the triangle at the dotted line. put it on the other side, and you have a rectangle. 4.5x4.3=19.35

the "5cm" is a red herring. and accurate red herring, but a red herring nonetheless.

Answer 2

The answer is 19.35.