classifying triangles

A triangle has side lengths of 19 centimetres, 19 centimetres, and 20 centimetres. What type of triangle is this?

• equilateral triangle

• isosceles triangle

• scalene triangle

• none of the above

When classifying a triangle by its sides, what type of triangle has exactly two equal sides?

• equilateral triangle

• isosceles triangle

• scalene triangle

• none of the above

Which would be the best classification for the triangle shown?

• acute isosceles
• right scalene
• acute scalene
• obtuse scalene

Which would be the best classification for the triangle shown?

• right isosceles
• obtuse scalene
• obtuse isosceles
• right scalene

What type of triangle is shown?

• Scalene

• Right

• Isosceles

• Equilateral

A right triangle has...

• One right (90°) angle

• All angles less than 90°

• All angles greater than 90°