find (a) the area and (b) the circumference of each circle using π=3.14. Round to the hundredths' place. 1. the diameter of the
circle is 9.5cm. 2. the radius of the circle is 4cm.
2 answers:
28a) area = π (r^2) = π (4.75^2) = 70.84625 cm^2
28b) circumference = πD = π (9.5) = 29.83 cm
29a) area = π (r^2) = π (4^2) = 50.24 cm^2
29b) circumference = πD = π (8) = 25.12 cm
area = pi x r^2
circumference = 2x pi x r or pi x d
1st one diameter = 9.5 cm
so radius = 9.5/2 = 4.75
area = 3.14 x 4.75^2 = 70.85 square cm
circumference = 3.14 x 9.5 = 29.83 cm
2nd one radius = 4
area = 3.14 x 4^2 = 50.25 square cm
circumference = 2 x 3.14 x 4 = 25.12 cm
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