Two formulas here:
Area = πr²
Circumference = 2<span>πr
So first we solve for r from area:
25</span>π = πr²
25 = r²
r = 5
So we know that radius is 5 cm.
Now substitute r to 5 in circumference formula:
C = 2π(5) = 10π
Final answer: 10π cm
Hope this helps.
The only quadrant where x>0 and y<0 is the fourth quadrant.
= x(8 -8) +(10 +13)
= 0 +23
= 23
Selection D is appropriate.
Answer:
1.
a = 112
b = 68
c = 68
2.
a = 127
3.
a=35
b=40
c=35
d=70
4.
a= 30
b=70
c = 30
d=70
e = 130
I'll help you with the rest later
Step-by-step explanation:
a = 112 because of allied angles rule
b and c = 68 because of angles at a point
360-112-112 ÷2
2. a = 127 because of angles on a straight line rule.
180-38-15
3. d= 70, vertically opposite angle
using angles on a straight line, 180 - 70 - 40 ÷ 2
we now have the two angles and because they are vertically opposite a and c = 35
b = 40 because of vertically opposite angles
4. a=30 because 90-70
since a=30, take 90 - 30 to get b, 70
d= 70, vertically opposite angles
e = 130 because a+b+c, vertically opposite angles
