The circumference of a circle = \(\pi d\) or \(2\pi r\). Look at the sector of the circle shown below. To calculate the length of the arc, we need to know what fraction of the circle is shown.

Calculate the arc length to 2 decimal places. First find what fraction of the whole circle we have. 90° is one quarter of the whole circle (360°). Therefore, the arc length is \(\frac{1}{ ...

Learn about the size, temperature, and colour of each planet, and discover why Pluto is no longer considered a planet.