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lozanna [386]
3 years ago
12

E the location for each of the following staring points andlocation changes6. (5.3), 67- 8.5.3

Mathematics
1 answer:
Maksim231197 [3]3 years ago
4 0
You have to to take the whole paper so i can able understand
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Given trapezoid abcd with bases ab and cd, draw diagonals ac and bd. let e be the midpoint of ac and f the midpoint of bd. prove
mylen [45]
Consider the picture.

Let MN be the midsegment of the trapezoid.

That is M is the midpoint of AD, N is the midpoint of BC.

Being the midsegment of the trapezoid, MN is parallel to the bases.


Let O and K be the intersections of the diagonals with the midsegment.




MN//AB, so MO//AB, and since M is the midpoint of DA, O must be the midpoint of DB, 

Similarly we prove that K is the midpoint of CA.

Thus O is F and K is E.

O and K lie on the midsegment MN, so F and E lie on the midsegment.



MO is a midsegment of triangle ABD so |MO|=1/2 |AB|=1/2 * 10=5

MK is a midsegment of triangle ADC, so |MK|=1/2 * |DC|=1/2 * 22=11

|OK|=|MK|-|MO|=11-5=6 (units)

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4 years ago
Write a sentence to model the following equation:<br> -20+20=0
klemol [59]

Answer:

Step-by-step explanation:

Negative 20 plus 20 equals 0

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3 years ago
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Three women and three children wish to cross a river in a canoe that will hold only one woman and or two children. they can all
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that is amount of women and children lefton original side


ok, first realize you must get children across first because who will row the boat back

first trip: 10min, 2 children across, (3,1)
2nd trip: 20min, 1 kid cross back (3,2)
3rd trip: 30min, 2 kids cross (3,0)
4th trip: 40 min, 1 kid cross baack (3,1)
5th trip: 50 min, 1 woman cross (2,1)
6th trip: 60 min, 1 kid cross back (2,2)
7th trip: 70 min, 1 woman cross (1,2)
8th trip: 80 min, 1 kid cross back (1,1)
9th trip: 90 min, 1 woman cross (0,1)
10th trip: 100min, 1 kid cross back (0,2)
11th trip: 110 min, 2 kids cross back (0,0)

min time is 110 mins or 1hr 50min
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4 years ago
I NEED HELP WITH MATH PLEASE <br> FIND THE VALUE OF THE VARIBLE
Elina [12.6K]
T = 60°
all interior angles of a triangle always add up to 180°. using this information we can divide 180 by 3 to get 60.
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4 years ago
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