Question

1. ____ in the given circle, om represents the radius.
2. ____ in the given circle, pq represents the diameter.

question (3): calculate the circumference of a circle with a radius of 7 cm.
(use π=3.14)
(1)
question (4): find the area of each compound shape. round your answer
to 1 decimal place if necessary.
(12)
a)
b)
c)
d)

Explanation:

Step1: Recall the formula for circumference of a circle

The formula for the circumference \( C \) of a circle is \( C = 2\pi r \) or \( C=\pi d \) (where \( r \) is the radius and \( d \) is the diameter, \( d = 2r \)). Here, we use \( C = 2\pi r \) with \( r = 7 \) cm and \( \pi=3.14 \).

Step2: Substitute the values into the formula

Substitute \( r = 7 \) and \( \pi = 3.14 \) into \( C = 2\pi r \). So, \( C=2\times3.14\times7 \).

Step3: Calculate the value

First, calculate \( 2\times3.14 = 6.28 \). Then, \( 6.28\times7=43.96 \) cm.

Answer:

The circumference of the circle is \( 43.96 \) cm.