Understand Radian Measure

​Chapter 9.3

RADIAN MEASURE

Multiple Choice

Let's Recap!

Radian is a different unit to measure angle.

• TRUE

• FALSE

​1 Radian is 

​the size of the angle subtended at the centre of a circle by an arc equal in length to the radius of the circle.

Multiple Choice

What is the angle at centre subtended by the arc in radian?

• 1 rad

• 5 rad

• 3 rad

• 0.5 rad

Multiple Choice

What is the angle at centre subtended by the arc in radian?

• 6 rad

• 1 rad

• 2 rad

• 0.5 rad

Multiple Choice

What is the angle at centre subtended by the arc in radian?

• $$\frac{\pi}{2}$$   rad

• 1 rad

• $$\pi$$  rad

• $$2\pi$$   rad

Multiple Choice

What is the angle at centre subtended by the arc in radian?

• $$\frac{\pi}{2}$$   rad

• 1 rad

• $$\pi$$  rad

• $$2\pi$$   rad

Fill in the Blanks

Express $120\degree$   in radians, giving your answer to 3 significant figures.

Fill in the Blanks

Express $295\degree$   in radians, giving your answer to 3 significant figures.

Fill in the Blanks

Express $\frac{3\pi}{2}$   radians in degrees, giving your answer to 3 significant figures.

Fill in the Blanks

Express $0.283$   radians in degrees, giving your answer to 3 significant figures.

​Moving on, we will learn more about arc length and area of sector in radian...​

​HEAD OVER TO YOUR SLS NOW! :)