Understanding Angles with an Angle Ruler

What is the first step in using an angle ruler to measure an angle?

• Align the rivet with the vertex

• Swing the top arm around

• Check the dial for the angle measurement

• Align the blue line with the top ray

How can you determine the exact measurement of an acute angle?

• By aligning the angle ruler with the top ray

• By checking if the angle is less than 90°

• By using the angle ruler to measure and check the dial

• By rotating the paper to face the correct direction

What should you do if the rays do not align with the angle ruler when measuring an obtuse angle?

• Rotate the angle ruler or the paper

• Use a different tool

• Estimate the angle visually

• Ignore the misalignment and measure

When measuring a reflex angle, what is the advantage of using an angle ruler?

• It automatically adjusts to the correct angle

• It can measure angles up to 360°

• It provides a digital readout

• It can measure angles up to 180°

If a reflex angle is measured incorrectly as 60°, how can you find the correct measurement?

• Divide 360° by 60°

• Multiply 60° by 2

• Subtract 60° from 360°

• Add 60° to 180°