A spinner with 6 equally sized slices has 1 blue slice and 5 yellow slices. The dial is spun and stops on a slice at random. What is the probability that the dial stops on a red slice?
Write your answer as a fraction in simplest form.

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.