# All About Pi – Practice ProblemsHaving fun while studying, practice your skills by solving these exercises!

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Do you need help? Watch the Video Lesson for this Practice Problem.

After this lesson, you will be able to use the approximate value of pi to solve math real-world problems.

The lesson begins by teaching you that pi has an approximate value of 3.14 or 22/7. It leads you to learn that pi is needed to find the circumference and area of a circle . It concludes with an understanding that pi plays an important role when solving problems involving circles.

Learn about pi by helping Granny Griswold distinguish the correct size of pumpkin pie for dessert.

This video introduces new concepts, notation, and vocabulary such as the term radius (the distance from the center to the circumference of a circle); diameter (a line that passes through the center of a circle whose endpoints are on the circle and exactly twice the measure of the radius); circumference (the distance around the edge of a circle); area ( the measure of surface or region covered of any 2D object); pi ( an irrational number with an approximate value of 3.14 or 22/7 and known also as the ratio of a circle’s circumference to its diameter)

Before watching this video, you should already be familiar with finding revolutions, circumference and area of a circle together with their formulas.

After watching this video, you will be prepared to learn to solve real-life problems and Mathematics concepts involving pi.

Common Core Standard(s) in focus: 7.G.B.4 and 7.G.B.6
A video intended for math students in the 7th grade
Recommended for students who are 12-13 years old

Exercises in this Practice Problem
 Identify the different parts of a circle. Calculate area and circumference of the given circles. Identify true statements about circles and $\pi$. Calculate the distance traveled by the delivery truck. Determine which numbers are rational and which numbers are irrational. Determine the different measurements of the Ferris wheel.