R,O,C,A are the midpoints of the sides of the rhombus DJSB. if DJ= 16 sq rt of 2 cm and d=120 degrees, what is the perimeter of ROCA?
2 answers
Review your question if it is correctly asked
In triangle DRA, draw an altitude DK where K is on RA, to get a 30-60-90° triangle
and you should know that the corresponding sides are in the ratio 1 : √3 : 2
So RK/(6√2) = √3/2
x = 3√6
then RA = 6√6
and the perimeter is 24√6
and you should know that the corresponding sides are in the ratio 1 : √3 : 2
So RK/(6√2) = √3/2
x = 3√6
then RA = 6√6
and the perimeter is 24√6
1 answer