3 years ago

What is the area of this

1 answer:

3 0

Area of the paralellogram = base * altitude

WE calculate the altitude using pythagoras:_

altitude ^2 = 5^2 - 3^2 = 16

so altitude = 4 units

the base = 4 units so the area of parallelogram = 4*4 = 16 units^2

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Work out the area of this circle. Take pi to be 3.142 and give your answer to 1 decimal place

Rashid [163]

Step-by-step explanation:

I think you have forgotten to attach the question.

Anyways....

In order to find the area of a circle use the formula:

π $r^{2}$ Where r is the radius

For example the radius is 3cm. The area of the circle will be:

π × $3^{2}$

Since you have taken pi as 3.142...

3.142 × $3^{2}$

3.142 × 9

= 28.278

In order to find the answer to 1 decimal place, check the number next to the number right after the decimal. Is it a number greater than or equal to 5? then add +1 to the number.

= 28.3 $cm^{2}$