Answer:
radius = 21
Step-by-step explanation:
(180-76) + 42 + (180-x) = 180
104 + 42 + 180 - x = 180
-x = 180 - 326
x = 146°
The area of the base = 15 * 15 = 225 m2
ande tharea of each sloping triangular side = 1/2 * 15 * 18 = 135 m2
so total surface area = 225 + 4*135 = 765m2
Answer:
you have to add each
Step-by-step explanation:
