Answer:
1)Area; A = ¼πr²
Perimeter; P = πr/2 + 2r
2)A = 19.63 cm²
P = 17.85 cm
3) r = 8.885 cm
4) r = 14 cm
Step-by-step explanation:
This is a quadrant of a circle. Thus;
Area of a circle is πr². A quadrant is a quarter of a circle. Thus;
Formula for Quadrant Area is; A = ¼πr²
A) Perimeter of a circle is 2πr. Thus, perimeter of a quadrant is a quarter of the full circle perimeter.
Formula for the quadrant perimeter in the image given is;
P = 2πr/4 + 2r
P = πr/2 + 2r
B) When r is 5 cm;
A = ¼π(5)²
A = 19.63 cm²
P = π(5)/2 + 2(5)
P = 17.85 cm
C) when A is 100cm²:
¼πr² = 100
r² = 100 × 4/π
r² = 78.9358
r = √78.9358
r = 8.885 cm
D) when P = 50 cm.
50 = πr/2 + 2r
50 = (½π + 2)r
r = 50/(½π + 2)
r = 14 cm
Answer:
your answer is 17 hope I helped
It is B!!! If you take 3 3/4 times the # of sides which in this case is 4 equals 15 in the end.
Answer:
Let the length of the first shelf = x
Length of second shelf = 2x + 18
Length of third shelf = x - 12
Length of remaining shelf = x + 4
Since Robert has to use a board of 2.5 m , the sum of lengths of all these shelves should be 250 cm
<em>So, x + 2x + 18 + x - 12 + x + 4 = 250 </em>
<em>5x + 10 = 250</em>
<em>5x = 240</em>
<em>x = 48 cm</em>
Therefore, the length of the first shelf should be 48 cm
Kindly Mark Brainly, Thanks
