Area of rectangle: 3 times 14 = 42 square cm
Perimeter of rectangle: 3+14+3+14 = 34 cm
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It is an equilateral triangle that has 3 equal sides of 14 cm
5*3 = 15 square cm
the width equals 14 cm. and the length equals 31 cm.
32 + 82 = diagonal2 (9 + 64) = 8.544
The perimeter is when you add all the sides up. so the formula is L+W+L+W=P. (P = 2W + 2L)In this case it would be 11+3+11+3= 28 cm