Given a triangle with side lengths $3$, $4$, and $5$, which best describes the triangle?

Classify the triangle below according to its sides and angles.

I. Equilateral

II. Isosceles

III. Scalene

IV. Acute

V. Obtuse

VI. Right

Find the missing angle $\(\theta\)$ for this right triangle.

Calculate the missing side of the triangle below.

Fill in the blank(s) to correctly complete each sentence.

The sum of the measures of the angles of any triangle is ________________ .

Fill in the blank(s) to correctly complete each sentence.

An isosceles right triangle has one ________________ angle and ______________ equal sides.

Fill in the blank(s) to correctly complete each sentence.

An equilateral triangle has _________________ equal sides.

Find the measure of each marked angle. In Exercises 19–22, m and n are parallel. See Examples 1 and 2 .

<IMAGE>