United States of America
Grade 4
9.04 Right angles
Lesson
Are you ready?
Do you remember what the measure of an angle represents? Let's try this problem to review.
How many $1^\circ$1° angles fit into a full circle?
Learn
Let's learn about right angles and how we can compare other angles to them.
Apply
Question 1
A right angle is a:
Quarter turn
AHalf turn
B
Question 2
Which of the following is a right angle?
A
B
Remember!
A right angle is exactly $90^\circ$90°.