Afigure is made up of an equilateral triangle and a square of side 7cm. the perimeter of the figure is a) 20 cm b) 28 cm c) 35 cm d) 42 cm tell ! ! 50 !

So a square has 4 sides so let's calculate the perimeter of the square,

7 × (4) = 28

Making answer choice B) 28 wrong since that is the perimeter of the square only.

Since it is an equilateral triangle meaning all three sides are equal, it will be unsolvable if the triangle has different sides but assuming that it's lengths are also 7 and that the triangle is on top directly of the square then since a triangle has 3 sides,

7 × (3) = 21

BUT, since one side of the triangle was already accounted for then it will be,

7 × (2) = 14

28 + 14 = 42

To conclude, your answer is D) 42 cm.



I hope that helps you out!!

Any more questions, please feel free to ask me!!

;)

~Zoey

P is the principal amount, $8000.00.

r is the interest rate, 9% per year, or in decimal form, 9/100=0.09.

t is the time involved, 18year(s) time periods.

So, t is 18year time periods.

To find the simple interest, we multiply 8000 × 0.09 × 18 to get that:

The interest is: $12960.00