Chapter 1: Q. 20 WE (page 21)

Without measuring, sketch each angle. Then use a protractor to check your accuracy.
$45 °$ angle

Short Answer

Expert verified

The angle without measuring is

With protractor angel will be near about $45 °$ .

Step by step solution

- Apply the protractor postulate

$\bar{A H}$ in a given plane is considered.

Any point O between A and H is chosen.

Consider $\bar{O A}$ and $\bar{O H}$ all these rays are drawn from O on one side of $\bar{A H}$ .

These rays’ results in pairing with the real numbers from 0 to 180 in such a way that:

The line $\bar{O A}$ is paired with 0, and $\bar{O H}$ with 180.

If $\bar{O B}$ is paired with $x$ , and $\bar{O C}$ with $y$ , then $m ∠ B O C = | x - y |$ .

– Sketch angle 90o without measuring

Thus, the figure is shown below, have $∠ A O B = 45^{\circ}$ .

– Superimpose the protractor to check the accuracy

By taking a protractor and put it over the $∠ A O B$ . Superimpose the protractor’s $\bar{O A}$ line with the drawn angles $\bar{O A}$ line. Measure the angle by using the protractor postulate.

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Without measuring, sketch each angle. Then use a protractor to check your accuracy.
$45 °$ angle

Short Answer

Step by step solution

- Apply the protractor postulate

– Sketch angle 90o without measuring

– Superimpose the protractor to check the accuracy

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Without measuring, sketch each angle. Then use a protractor to check your accuracy.45°angle

Short Answer

Step by step solution

- Apply the protractor postulate

– Sketch angle 90o without measuring

– Superimpose the protractor to check the accuracy

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Geometry

Statistics

Probability and Statistics

Mechanics Maths

Pure Maths

Decision Maths

Study anywhere. Anytime. Across all devices.

Without measuring, sketch each angle. Then use a protractor to check your accuracy.
$45 °$ angle