United States of America
Grade 4
9.06 Measure and compare angles
Lesson
Are you ready?
Do you remember how to estimate angles?
Which angle is greater than $180$180 degrees?
A
B
C
Learn
Let's see how we can compare two angles of a skateboard ramp!
Apply
question 1
Which of these angles is larger?
A
B
Learn
We can measure the exact angle, using a special tool called a protractor. Let's see how to use one.
Apply
Question 2
What is the angle being measured by this protractor?
$\editable{}$ degrees
Remember!
A protractor is an instrument that allows us to measure an angle. Start with one arm of the angle on the $0^\circ$0° line and read the amount of turn required to reach the second arm.
