Answer:
A) 100pi cm^2
Step-by-step explanation:
area of a circle: r^2pi
radius=1/2diameter
diameter=20 cm
radius=10cm
10^2pi cm
100pi cm^2
Answer:
Step-by-step explanation:
the answer is A OK
Answer:
Step-by-step explanation:
Where p is the distance from focus to vertex, the equation of the parabola with focus at (0, p) is ...
Your parabola has p=9, so the equation is ...
Answer:
a.
2x+4x+3x=180 sum of interior angle of the triangle is 180
9x=180
x=180/9=20
b.
x-20+x+10+x-20=180sum of interior angle of the triangle is 180
3x-30=180
3x=180+30
x=210/3=70
c.x+10+x+20+x=180 linear pair
3x+30=180
3x=180-30
x=150/3=50