Mensuration Practice Test 8

Question : 32 of 40

Marks: +1, -0

If each interior angle of a regular polygon measures 140°, then it is:

Heptagon
Decagon
Tetrahedron
Nonagon

Solution:

Sum of the exterior angle and the interior angle of a regular polygon is 180°.
So, if interior angle is 140°, then its exterior is 40°.
Sum of all the exterior angles of a regular polygon is 360°
So number of sides =

{360}/{40}

= 9 sides
Nonagon consists of 9 sides.

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