I think it’s 1 feet because the tops are touching you have to spread the bottoms apart so it can touch
BD is a angle bisector and Angle bisector theorem says
ratio of other sides of the triangle formed by bisector is equal
BA/AD=BC/CD
lets say AD is x so DC will be 4-x
3/x=4.5/4-x
x=1.6
AD=1.6units
so DC=4-x=4-1.6= 2.4 units
in scientific notation, we leave only 1 digit to left of the decimal point.
now
35681000000 is really the same as 35681000000.0
so we can say the zero is way over there on the right-side, and we have to move it to the left, right in front of the "3", between "3" and "5", so the "3" is the only digit to the left of the decimal point.
to do that, we'll be moving it hmmmmm 10 slots over, therefore
35681000000
3.5681000000 x 10¹⁰
or
3.5681 x 10¹⁰ <---- using only significant digits.
Trapezoid- 45 square units
Triangle- 27 square units
Parallelogram (to the right figure):
30 square units
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