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Glencoe Math: Course 1, Volume 2 View details

4. Surface Area of Triangular Prisms

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Exercise 26 Page 780

Check the angle measures.

Right

Practice makes perfect

Let's review how we can classify a triangle by its angles.

Triangle	Description
Acute Triangle	It has 3 acute angles. In other words, the three angle measures are less than 90^(∘).
Obtuse Triangle	It has 1 obtuse angle that measures more than 90^(∘).
Right Triangle	It has 1 right triangle that measures exactly 90^(∘).

Now, consider the given triangle.

Looking at the markings on the diagram, we have a 90^(∘) angle as one of the interior angles of the triangle. Therefore, one of the angles is a right angle and the triangle is a right triangle.

Subchapter links

Guided Practice p.776

Independent Practice p.777-778

H.O.T. Problems p.778

Standardized Test Practice p.778-780

Extra Practice p.779

Common Core Review p.780

Exercise 26 Page 780

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