Changing Dimensions What’s the effect on Perimeter and Area??

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Presentation transcript:

Changing Dimensions What’s the effect on Perimeter and Area??

Effect on Perimeter If the dimensions of a polygon are multiplied by x, then the perimeter of the polygon changes by a factor of x. The dimensions of Figure A are multiplied by 2 to produce Figure B. Perimeter of A = x 2 Perimeter of B = 3 3 2

perimeter Suppose the side lengths of the parallelogram below are tripled. What effect would this have on the perimeter? 4 in

Suppose the side lengths of the trapezoid at the right are multiplied by ½. What effect would this have on the perimeter? Justify your answer. 13 cm 14 cm 24 cm 14 cm

Effect on Area 5 6

The side lengths of the triangle below are multiplied by 5. What effect would this have on the area? Justify your answer. 1 cm 2cm

A rectangle measures 2 feet by 4 feet. Suppose the side lengths are multiplied by 2.5. What effect would this have on the area? Justify your answer.

Find the Area meters meters 8.1 meters

Find the area A three sided shape with two sides that are 14 inches, the base that is 9 inches and the height from the base to the top of the triangle that is 13.2 inches inches 2

Find the area Base 1 – 12 Base 2 – 15.2 Height – 22