Chapter 4 Review

A ________ is formed by three non collinear points connected by segments.

Classifying triangles by sides

• No congruent sides

• Equilateral

• Three congruent sides (all sides congruent)

• Isosceles

• At least two congruent sides

• Scalene

Classifying triangles by angles

• All three angles are acute

• Obtuse

• Exactly one obtuse angle

• Right

• All angles are congruent

• Equiangluar

• Exactly one right angle

• Acute

List the interior angles shown in the figure (select ALL correct answers).

• 1

• 2

• 3

• 4

• 5

The adjacent sides that share angle A in the figure are ​ (a)  

• AB and AC
• AB and BC
• AC and BC

The side opposite angle A in the figure is ​ (a)  

• BC
• AB
• AC

Angle ​ (a)   is opposite side BC in triangle ABC. (Notice: you do not need a picture to answer this question.)

• A
• B
• C

Classify the triangle shown by angles and sides.

Angles ​​ (a)   Sides ​ (b)  

• acute
• scalene
• equilateral
• equiangular
• isosceles
• right
• obtuse

Classify the triangle shown by angles and sides.

Angles ​​ (a)   Sides ​ (b)  

• obtuse
• isosceles
• equilateral
• equiangular
• right
• acute
• scalene

Classify the triangle shown by angles and sides.

Angles ​​ (a)   Sides ​ (b)  

• equiangular
• equilateral
• right
• acute
• scalene
• obtuse
• isosceles