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The angle opposite side RT = 12 will have the smallest measure

Q: If RST RS 15 RT 12 and ST 17. Which angle of RST has the smallest measure?

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The smallest internal angle possible for a regular polygon is 60 degrees. So either the angle is not 12 degrees or it is not an internal angle.

116 degrees

Exterior angle: 360/12 = 30 degrees Interior angle: 180-30 = 150 degrees

Its exterior angle is 12 degrees and it will have 360/12 = 30 sides

Exterior angle: 12 degrees Interior angle: 168 degrees

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It is angle RST.

The smallest internal angle possible for a regular polygon is 60 degrees. So either the angle is not 12 degrees or it is not an internal angle.

116 degrees

180 degrees( 12-2)=1800degrees This is the sum of the interior angles. So divide 1800 by 12 and have the measure of each angle.

78

90-78 = 12 degrees

Providing that it is a regular polygon then each exterior angle will measure 12 degrees

0 degrees

This is what is called basic geometry, usually for 8th or 9th graders. When one is this age, there will be a text book that explains these things. I suggest you..look..it...up.

Exterior angle: 360/12 = 30 degrees Interior angle: 180-30 = 150 degrees

For the 12-sided polygon, each exterior angle is 30 degrees (360/12).

Its exterior angle is 12 degrees and it will have 360/12 = 30 sides