Question

How did the Maya contribute to the field of mathematics?

they founded new mathematical branches such as geometry and trigonometry. 

They were one of two civilizations to independently devise the concept of zero.
They discovered the idea of 

pi, which is widely used in present-day mathematics.
They discovered mathematical tools such as the ruler, compass, and calculator.
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Answer 1

If you're doing plato the answer is B

Answer 2

The correct answer is B. They were one of two civilization to independently devise the concept of zero.

The three mathematical system which were constituted by Maya were

1. Dot which represented value of one.

2. Bar which represented five.

3. Shell which represented zero.

The symbols were used to track events in a calendar. For their calculations they used vigesimal system. For example, 1, 20, 400, 8,000.

Some of their numbers were calendar dates and were being written from the bottom side to the top side.