8.13 Circles and Angles

Circles and Angles

1. 1. Differentiate between concave and convex shapes.
2. 2. Identify and classify different types of angles (acute, right, obtuse, straight, reflex).
3. 3. Understand the definition of a circle and the concept of π as the ratio of circumference to diameter.
4. 4. Calculate the circumference of circles using C = 2πr or C = πd.
5. 5. Calculate the area of circles using A = πr².
6. 6. Find the radius or diameter of a circle given its circumference or area.
7. 7. Solve composite problems involving circles, semicircles and rectangles.