4th Grade GoMath Chapter 11

How many degrees are in an angle that turns through $\frac{1}{2}$  of a circle?

•  $90^{\degree}$  

•  $180\degree$  

•  $270\degree$  

•  $360\degree$  

Use a protractor. What is the measure of ∠ JKL?

• $50\degree$

• $60\degree$

• $110\degree$

• $120\degree$

Use the diagram. Which equation can you use to find the m∠ KFG in the figure?

• $50\degree+80\degree=\ ?$

• $180\degree-80\degree=\ ?$

• $180\degree-55\degree=\ ?$

• $180\degree-\left(55\degree+80\degree\right)=\ ?$

Use the diagram. Which is an obtuse angle in the figure?

• $\angle EFJ$

• $\angle GFK$

• $\angle JEG$

• $\angle JFK$

What is the measure of the unknown angle in the figure?

• $15\degree$

• $105\degree$

• $115\degree$

• $165\degree$

Two angles form a straight angle. One angle measures 107°. What is the measure of the other angle?

• $253\degree$

• $83\degree$

• $73\degree$

• $17\degree$

Which equation shows the sum of the measures of two right angles?

• $45\degree+45\degree=90\degree$

• $50\degree+50\degree=100\degree$

• $90\degree+90\degree=180\degree$

• $180\degree+180\degree=360\degree$

What term best describes the angle formed by the hands of the clock?

• acute

• obtuse

• right

• straight

• $47\degree$

• $57\degree$

• $90\degree$

• $123\degree$

Two angles form a straight angle. One angle measures 30°. What is the measure of the other angle?

• $60\degree$

• $120\degree$

• $150\degree$

• $180\degree$