Answer:
d looks like the best option. sorry if its isn't
Answer:
f=-x^2/2-2
Step-by-step explanation:
If the two diagonals are
and
, the are of the rhombus is

So, in your case, the area is

The other options are wrong because:
- option A doens't divide by 2, thus getting twice the area of the rhombus
- option B summed the diagonals instead of multiplying them
- option D took the difference of the diagonals.
know what is the third side length
the difference between the 2 other sides < the greatest side of triangle < the sum of 2 other sides
so here the answers here could be ( 10- 17 - 20)
10-8 < 13 < 10+8
13-8 < 17 < 13+8
13-8 < 20 < 13+8
Answer:
A. ∠B = 55°; ∠D = 55°
Step-by-step explanation:
Hope this helps :)