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3 years ago

8

How do you find area for an irregular polygon

2 answers:

Phoenix [80]3 years ago

6 0

Split it into two regular shapes, find each one, and add the areas together.

lubasha [3.4K]3 years ago

3 0

You don't do it it is impossible to do

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Explain how you can use mental math to compare 7 pounds to 120 ounces.

Eva8 [605]

One pound consists of 16oz, you have 120oz. If you divide 120 and 16 you get 7.5 lbs. so therefore you have more oz than lbs.

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3 years ago

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This is geometry can someone help me?

elena-14-01-66 [18.8K]

Answer: JG= 12.
Explantation: Since it is a parallelogram, we know that EJ and JG are congruent (equal). Therefore, we set EJ and JG as an inequality. (3w = w + 8) We solve for W and get w=4. Plug in 4 into the JG equation (4 + 8). The answer would be 12.

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3 years ago

Work out the area of the trapezium ABDE.<br> B<br> 9 cm<br> 6 cm<br> 8 cm<br> →D<br> E

Evgen [1.6K]

Answer:

Area of the trapezium ABDE = 30 cm²

Step-by-step explanation:

Area of a trapezium = $\frac{1}{2}(b_1+b_2)h$

Here, $b_1$ and $b_2$ are the parallel sides of the trapezium

h = Distance between the parallel sides

From the picture attached,

ΔCAE and ΔCBD are the similar triangles.

So by the property of similarity their sides will be proportional.

$\frac{AE}{BD}= \frac{CE}{CD}$

$\frac{9}{6}=\frac{CE}{8}$

CE = $\frac{9\times 8}{6}$

CE = 12 cm

Therefore, DE = CE - CD

DE = 12 - 8 = 4 cm

Now area of trapezium ABDE = $\frac{1}{2}(AE+BD)(DE)$

= $\frac{1}{2}(6+9)4$

= 30 cm²

Therefore, area of the trapezium ABDE = 30 cm²

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Complete this sentence:<br> 12x+24 is equivalent to 4(3x+6) so...

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These two problems are equivalent

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