Answer:
a
Step-by-step explanation:
it's a right triangle so we can use the pythagorean theorem to find h
pythagorean theorem: a^2+b^2=c^2
h^2+19^2=21^2
h^2+361=441
h^2=80
h≈ 8.9ft
64
x+81+x+39+50+62=360
2x+232=360
2x=128
x=64
Answer:
12
Step-by-step explanation:
the ruler measured 12
Well I need to know how many classes does the she teach and it would be 18