Maths Review - Introduction to Angles

What is this?

• angle

• time

• distance

• side

Which angle shows $90\degree$ ? 

• acute angle

• obtuse angle

• right angle

• straight angle

Which angle is less than 90°?

• obtuse angle

• right angle

• acute angle

• straight angle

Which angle is greater than 90° but smaller than 180° ?

• obtuse angle

• straight angle

• acute angle

• right angle

How many degree for a straight angle?

• $270\degree$

• $100\degree$

• $360\degree$

• $180\degree$

Which angle is smaller than $90\degree$ ?

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Which statement about this angle is CORRECT?

• It is smaller than $90\degree$ .

• It is equal to $90\degree$ .

• It is greater than $180\degree$ but smaller than $180\degree$ .

• It is equal to $180\degree$ .

Which shows a right angle?

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Which angle is greater than $90\degree$  but smaller than  $180\degree$ ?

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Choose all the CORRECT statements.

• The angle of a straight line is $180\degree$ .

• The half of a right angle is $45\degree$ .

• $90\degree$ is an acute angle.

• $160\degree$ is an obtuse angle.

• $100\degree$ is a right angle.