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mote1985 [20]
2 years ago
15

The adjacent sides of a parallelogram measure 14 centimeters and 20 centimeters, and one angle measures 57°. Find the area of th

e parallelogram.

Mathematics
2 answers:
Hatshy [7]2 years ago
8 0
The area of an isosceles triangle is given by

Area = base \: \times height
We have the base already given, so we just have to calculate the height using the sine ratio.

\sin(57 \degree) = \frac{h}{14}
\Rightarrow h = 14 \times \sin(57 \degree)

You may choose to use your calculator here, but I will prefer to keep it as it is and use the calculator value at the end.

Now let's plug our values inside the formula, yo obtain,

Area = 20 \times 14 \sin(57 \degree)
Area = 234.8 {cm}^{2}

Hence, the area of the parallelogram is 234.8cm²

Inga [223]2 years ago
7 0
Hello,
Let's h the height of the parallelogram:
sin 57°=h/14==> h=11,741387...
Area=h*20=234,827759... (cm²)



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