Classifying Triangles

An acute triangle has __________ angles that each measure less than 90°.

• one

• two

• three

• four

An isosceles triangle has _________ equal sides.

• one

• two

• three

• four

A right triangle has one angle that measures _______ and two acute angles.

• 90°

• less than 90°

• more than 90°

• 180°

An ____________ triangle has three equal sides.

• isosceles

• equilateral

• scalene

An obtuse triangle has one angle that measures _____________ 90°.

• less than

• exactly

• more than

A _________ triangle has no equal sides.

• scalene

• isosceles

• equilateral

If a triangle has all angles less than 90° and two equal sides, what type of triangle is it?

• Acute Isosceles
• Acute Scalene
• Obtuse Scalene
• Obtuse Isosceles

If a triangle has one angle greater than 90° and no equal sides, what type of triangle is it?

• Acute Isosceles
• Acute Scalene
• Obtuse Scalene
• Obtuse Isosceles

If a triangle has one angle exactly 90° and two equal sides, what type of triangle is it?

• Right Isosceles
• Acute Scalene
• Obtuse Scalene
• Obtuse Isosceles

If a triangle has all three angles equivalent and all three sides equivalent, what type of triangle is it?

• Acute Isosceles
• Equilateral
• Obtuse Scalene
• Obtuse Isosceles