Well, a Centimeter is 10 times bigger than a Milimeter.
So we can convert 9cm by multiplying it by 10
9 × 10= 90mm
SInce we know the length and width of the rectangle, we can now find the area of it, or "the space inside".
Area = length × width
Area = 90mm × 81mm
Area = 7290mm
That would be .14
<em>How?</em>
Well that's easy all you have to do is set up 2.4÷16.8 Move the decimal over to the right to make it 24÷16.8 then at last you get dividing it. Do it how you would normally divide. Then you should get a huge decimal after you divide it. You want to round to the nearest hundredth (if necessary) so you should get .14 as your answer! Hope that helped!
180-130=50
180-96=84
angles in a triangle add up to 180
50+84=134
180-134=46
x=46 degrees
