Question

Medal for help.

Answer 1

What's your question?

Answer 2

@StudyGurl14

Answer 3

what formula do I use?

Answer 4

Area of rhombus = \(\Large\frac{d_1d_2}{2}\)

Answer 5

d is the diagonals. But first, you have to find the diagnoals using the information given

Answer 6

Can you find the length of half the other diagonal?

Answer 7

if we apply the therorem of Pitagora, we get:

namely the length of the diagonals are:
\(d=2 \cdot 7=14\), and \(D=2 \cdot 7 \sqrt3=14 \sqrt3\)
now, please the surface of rhombus, is given by the subsequent formula:

\[S = \frac{{D \times d}}{2} = \frac{{14 \times 14\sqrt 3 }}{2} = ...?\]

Answer 8

169.74

Answer 9

please what is the right option?

Answer 10

\[98\sqrt{3}\]

Answer 11

:)

Answer 12

that's right!

Answer 13

the value is equivalent to the radical.

Answer 14

yes! we can write this:
\[S = \frac{{D \times d}}{2} = \frac{{14 \times 14\sqrt 3 }}{2} = 98\sqrt 3 \simeq 169.74\]