Answer:
arithemetic sequence i guess
4
Step-by-step explanation:
slant hight is 30 cm.
ur welcome!!!!
18
PY = YV
YV = 12
VY = 18
m∡A = 100°
m∡B = 50°
m∡C = 30°
let 'x' = m∡B; 50°
let '2x' = m∡A; 100°
let 'x-20' = m∡C; 30°
x + 2x + x - 20 = 180
4x - 20 = 180
4x = 200
x = 50
