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Glencoe Math: Course 2, Volume 2

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Glencoe Math: Course 2, Volume 2 View details

1. Classify Angles

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Exercise 17 Page 540

The angle that is less than 90^(∘) is called acute angle.

A

Practice makes perfect

We are given a triangle with a marked angle.

To classify the angle, we can look only at the angle. We do not have to consider the whole triangle.

Now let's classify the angle.

Type	Measure
Acute	0^(∘)
Right	m=90^(∘)
Obtuse	90^(∘)
Straight	m=180^(∘)

Because our angle is less than 90^(∘), we know that it is acute. This corresponds to option A.

Subchapter links

Guided Practice p.538

Independent Practice p.539-540

H.O.T. Problems p.540

Standardized Test Practice p.540-542

Extra Practice p.541

Common Core Review p.542