Which of the following polygons has three lines of symmetry a. regular pentagon b. square c. regular hexagon d. equilateral triangle

D. Equilateral triangle

Step- by-step explanation:

Regular polygon is a polygon which has all the angles and sides are in the same measure.

The number of line of symmetry on the regular polygons depends upon the number sides.

Regular pentagon - which is 5 sided figure, so there will be five lines of symmetry.

Square - which 4 sided figure, so there will be four lines of symmetry.

Regular hexagon - which is 6 sided figure, so there will be six lines of symmetry.

Equilateral triangle - which is 3 sided figure all the sides and all the angles are in equal measure. There will be three lines of symmetry.

So, the answer is D. Equilateral triangle.

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step-by-step explanation:

answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3

step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.

sorry i don't know the other answer. i didn't learn what a proportional relationship is.