Answer:
for first one
in triangle
by using Pythagoras law
p²+b²=h²
7²+11²=h²
h=√170=13.03=13m
total height of a pole =7+13=20m
Step-by-step explanation:
for second one
h =√(10²-(16/2)²)=√(100-64)=6in
area of triangle =1/2 base×height
=1/2 (16×6)=16×3=48in²
48in² is the area of triangle
