Given:
perimeter of a sector of a circle = 7cm
area of a sector of a circle = 3 cm²
Perimeter of a sector = 2r + l = 2r + rΘ
2r + 2Θ = 7
area of a sector = (Θ/2π) πr² = (Θ/2)r²
<span>(Θ/2)r² = 3 </span>⇒ Θ = 6/r²
2r + rΘ = 7
2r + r(6/r²) = 7
2r + 6/r = 7
r(2r + 6/r) = r*7
2r² + 6 = 7r
2r² - 7r + 6 = 0
2r² - 4r - 3r + 6 = 0
2r(r - 2) - 3(r - 2) = 0
(2r - 3) (r - 2) = 0
2r - 3 = 0
2r = 3
r = 3/2 or 1 1/2
r - 2 = 0
r = 2
Possible radii are 2 cm and 1 1/2 cm.
Answer:
2 pencils and bought three pens
Step-by-step explanation:
Answer:
Step-by-step explanation:
te falta el factor terminal sige con las letras delabesedario
Answer:
the inside angle beside 101 is 180-101 = 79 degrees.
the angle beside x = 180-(79+38).
that is 63 degrees.
therefore the angle x = 180-63 that's
117 degrees
Answer:
1. given
2. definition of angle bisector
3. reflexive property
4. given
5. definition of angle bisector
6. i have no idea since there are no labels
Step-by-step explanation:
I don't think anyone will answer this since the triangles have no label on what is A, B, C, D and on