Question

which unit of measure would be appropriate for the area of a picture that is 20 centimeters tall and 15 centimeters wide​

Answer 1

Answer:300 cm2(in the case of rectangle)

Explanation:

The question is ambiguous.Something is missing.what is the shape of the object is not told here.

But if you consider it a "rectangle",the angles will be right angles.

area of a rectangle=length×breadth

=20cm×15cm

=300 centimetre2

Answer 2

Answer: square centimeters

Explanation:

Hi, the answer to the question is square centimeters.

The lengths of the picture are in centimeters. So, when you calculate the area of the picture that is a triangle you obtain square centimeters.

Mathematically speaking:

20cm x 15 cm = 300 square centimeters

By multiplying the same unit you obtain the square unit.

Feel free to ask for more if it´s necessary or if you did not understand something.