<h3>Given:</h3>
<h3>To find:</h3>
The mathematical name for the given 2 polygons.
<h3>Solution:</h3>
The first polygon has 6 sides with an angle sum of 720°, which means the mathematical name given for this polygon is,

The second polygon has 7 sides with an angle sum of 900°, which means the mathematical name given for this polygon is,

<u>Hence,</u><u> </u><u>the</u><u> </u><u>first</u><u> </u><u>polygon</u><u> </u><u>is</u><u> </u><u>a</u><u> </u><u>hexagon</u><u> </u><u>and</u><u> </u><u>the</u><u> </u><u>second</u><u> </u><u>polygon</u><u> </u><u>is</u><u> </u><u>a</u><u> </u><u>heptagon</u><u>.</u>