Answer:
or around 57.88
Step-by-step explanation:
We can find the base length by using the formula for the area of a triangle.

Plug in the values that we know, the area and the height, and solve for
.


or about 57.88 if you round to the nearest hundredth.
Answer:i think it is A
Step-by-step explanation:
B)16
add the two equations and equal it to 90 and solve to get 16
Two angles are supplementary when they <span>add up to 180 degrees.
x = angle
19x-60 = </span><span>supplement angle
x + 19x - 60 = 180
20x = 180 + 60
20x = 240
x = 240/20
x = 12</span>° ← answer
Answer: 20.48
Step-by-step explanation:
use the pythagorean theorem for the diagnal sides
3^2+3^2=c^2
9+9=c^2
18=c^2

this gives you 4.24
now add 6+6+4.24+4.24 to get 20.48