I need help on #16 and #14, when I did question 15 it was fine but I keep running into problems on how to solve 14 and 16
2 answers:
The area of a circle is pi*r^2.
The angles in a circle add up to 360 degrees.
Let's say I have a circle with radius 2.
The total area of the circle is pi* (2^2) = 4pi
Let's say I cut out 15 degrees of this circle. This piece is 15 out of 360 of the whole circle.
The area of this part is (15/360) * 4pi
The rest of the area is (360-15)/360 * 4pi.
I hope this helps.
General formula to find the area of a circle
To find a sector area of a circle
NUMBER 14
Given information:
r = 12 cm
degree of sector = 110° (use the angle on the shaded area)
The area of the sector:
sector = 44 × 3.14
sector = 138.16
The area is 44π ≈ 138.16 cm²NUMBER 16Given information:
r = 30 yards
degree of sector = 15° (use the angle on the shaded area)
The area of the sector:
sector = 37.5 × 3.14
sector = 117.75
The area is 37.5π ≈ 117.75 yd²
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