Keke J.

asked • 03/23/14

Devon and Jamal both draw regular polygons. Devon's polygon has 14 sides. Jamal's polygon has 15 sides. Which statement is NOT true?

Devon and Jamal both draw regular polygons. Devon's polygon has 14 sides. Jamal's polygon has 15 sides. 

Amanda A.

The title implies this is a multiple choice question, but the body of the text just describes the two polygons with no question. If you provide more info, I'm sure someone could help you out!
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03/23/14

Daisy M.

i have the same question, the question is indeed mutlple choice the options i have are as follows
A. The measures of all the exterior angles of Devon’s polygon are equal.
B. The sum of all the exterior angles of Devon’s polygon equals the sum of all the exterior angles
of Jamal’s polygon.
C. The measure of one of the exterior angles of Jamal’s polygon is greater than the measure of
one of the exterior angles of Devon’s polygon.
D. The measure of one of the exterior angles of Jamal’s polygon plus the measure of the adjacent
interior angle is 180°.
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03/27/14

Daisy M.

funny i have the same question teh question is indeed a multiple choice question here are the options 
A. The measures of all the exterior angles of Devon’s polygon are equal.
B. The sum of all the exterior angles of Devon’s polygon equals the sum of all the exterior angles
of Jamal’s polygon.
C. The measure of one of the exterior angles of Jamal’s polygon is greater than the measure of
one of the exterior angles of Devon’s polygon.
D. The measure of one of the exterior angles of Jamal’s polygon plus the measure of the adjacent
interior angle is 180°.
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03/27/14

3 Answers By Expert Tutors

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IBRAHIM A. answered • 03/24/14

Educated Tutor For Excellent Grades in Various Subjects

This is not true: Devon and Jamal both draw regular polygons.
 
because Devon has drawn a regular tetra-decagon and Jamal drew a regular pentadecagon
 
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Steve S.

What's not true?
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03/24/14

IBRAHIM A.

Devon and Jamal both draw regular polygons - Not true
 
Devon's polygon has 14 sides - True
 
Jamal's polygon has 15 sides - True
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03/24/14

Steve S.

"A regular polygon is ... both equiangular and equilateral."; per http://mathworld.wolfram.com/RegularPolygon.html. The Pentagon in Washington is a regular 5-gon. Stop signs are regular octagons. Equilateral triangles are regular trigons. Squares are regular 4-gons.
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03/24/14

Parviz F.

I agree, the question does not ask for the difference in  sides of the polygons, as far as regularity both are regular , but different sides.
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03/24/14

Steve S. answered • 03/24/14

Tutoring in Precalculus, Trig, and Differential Calculus

14 sides:
Each external angle: 360°/14
Each internal angle: 180°-360°/14

15 sides
Each external angle: 360°/15
Each internal angle: 180°-360°/15

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3/27/14, 22:05 EST

Devon and Jamal both draw regular polygons. Devon's polygon has 14 sides. Jamal's polygon has 15 sides. Which statement is NOT true?

A. The measures of all the exterior angles of Devon’s polygon are equal.
B. The sum of all the exterior angles of Devon’s polygon equals the sum of all the exterior angles of Jamal’s polygon.
C. The measure of one of the exterior angles of Jamal’s polygon is greater than the measure of one of the exterior angles of Devon’s polygon.
D. The measure of one of the exterior angles of Jamal’s polygon plus the measure of the adjacent interior angle is 180°.

C is FALSE. Jamal’s exterior angles are each 360°/15 while Devon’s exterior angles are each 360°/14. So Devon’s is larger.

All the others are TRUE.
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Parviz F.

So 14 sides and 15 sides are both regular polygons of different sides, why the statement is not true.
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03/24/14

Steve S.

IBRAHIM thinks its not true. It is true, though.
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03/24/14

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