The formula for the area of a rhombus is a =1/2 d1d2, where d1 and d2 are the lengths of the diagonals. which are equivalent equations? check all that apply. d1 = 2ad2 d1 = 2a/d2 d2 = d1/2a d2 = 2a/d1 d2 = 2ad1

B. d1 = 2a/d2

D. d2 = 2a/d1

Step-by-step explanation:

In this question, the formula of area of rhombus is given, which is

And whether we need to write the equivalent expression in terms of d1 or d2, we have to get rid of the denominator 2 first.

And for that, we multiply both sides by 2.

If we have to solve for d1, we have to divide both sides by d2. And if we have to solve for d2, we have to divide both sides by d1 . That is

Correct options are second and fourth .

it is 10.6 according to my calculations

t= half of the arc subtended by t.

r= half of the arc subtended by r.  

t+r= half of the arc subtended by t + half of the arc subtended by r= half of 360=180

step-by-step explanation: