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3 years ago

I need help with number 30 and please show work

Mathematics

2 answers:

vesna_86 [32]3 years ago

4 0

To find the area of a rectangle, the area equation is A= length X width. So you have to take all the rectangles and add the areas together to get the whole area of the polygon.
So the left rectangle is 12 X 4 = 48.
the middle bottom rectangle is 14 X 6= 84.
the top right triangle, is 5 X 4= 20.

So then you add all of the areas together.

48+84+20= 152.

Area of the Polygon= 152 cm

Lady bird [3.3K]3 years ago

3 0

30)

10 x 6 = 60
11 x 4 = 44
12 x 4 = 48

60 + 44 + 48 = 152 cm^2

answer: area = 152 cm^2

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====================================================

Explanation:

Part (a)

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------------------------------------

Part (b)

If the third side is not the hypotenuse then that must mean c = 30 is the hypotenuse as this side is larger than the 20 cm side. The hypotenuse is always the longest side.

Let a = 20 be the known leg. Let's find the other unknown leg b using the pythagorean theorem.

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