The original length of a side was 13m
I got this by
taking 3m and * it by 4 because thats how many sides there are then
I got 12 so I subtracted 12 from 64 i got 52
so i divided the 52 by 4
which is
13
Answer:
7 ones, 4 tenths,8 thousandths
Step-by-step explanation:
(7×1)+(4×1/10)+(8×1/1000)
=7+4/10+8/1000
=7.408
Answer:
BC ≈ 19.4 cm
Step-by-step explanation:
Using the cosine ratio in the right triangle
cos71° = 
= 
= 
( multiply both sides by BC )
BC × cos71° = 6.3 ( divide both sides by cos71° )
BC = 
≈ 19.4 cm ( to 3 significant figures )
