Question

Image will be posted.... Consider rhombus ABCD . AB=1.5 inches and m 14 years ago

Answer 1

angle ABC = 60 then angle DCB = 120

all sides are equal use the cosine rule

\[AC^2 = 1.5^2 + 1.5^2 - 2\times 1.5 \times1.5 \times \cos(60)\]

and

\[BD^2 = 1.5^2 + 1.5^2 - 2 \times 1.5 \times 1.5 \times \cos(120)\]

you should be able to finish these

Answer 2

i dont have this type of calculator angle ABC = 60 then angle DCB = 120

all sides are equal use the cosine rule

AC 2 =1.5 2 +1.5 2 −2×1.5×1.5×cos(60)

and

BD 2 =1.5 2 +1.5 2 −2×1.5×1.5×cos(120)

Answer 3

well the simple thing to do is work in fractions

1.5 = 3/2 (3/2) ^2 = 9/4

cos(60) = 1/2 for the exact triangle ratios

cos(120) - -cos(60)

that should be enough to do it without a calculator...

or perhaps you could find an online calculator