# Lesson Worksheet: Types of Triangles: Sides Mathematics • 3rd Grade

In this worksheet, we will practice classifying triangles as equilateral, isosceles, or scalene by considering the lengths of their sides.

Q1:

What kind of triangles have all sides of the same length?

• Ascalene triangles
• Bequilateral triangles
• Cisosceles triangles
• Dright triangles

Q2:

What type of triangle is , in terms of its side lengths? • Aisosceles triangle
• Bscalene triangle
• Cequilateral triangle

Q3:

Are the number of lines of symmetry of a scalene triangle less than, equal to or greater than the number of lines of symmetry of an isosceles triangle?

• AGreater than
• BEqual to
• CLess than

Q4:

Are the number of lines of symmetry of an isosceles triangles less than, equal to or greater than the number of lines of symmetry of an equilateral triangle?

• AEqual to
• BLess than
• CGreater than

Q5:

James drew an equilateral triangle with two sides whose sum equals 16 inches. Determine the length of the third side.

Q6:

Complete the following: An equilateral triangle is a triangle whose sides are .

• Aintersecting at one point
• Bequal in length
• Cnot equal in length
• Dparallel

Q7:

Is an equilateral triangle an isosceles triangle?

• AYes
• BNo

Q8:

Are all isosceles triangles also equilateral triangles?

• ANo
• BYes

Q9:

Is this an equilateral, an isosceles, or a scalene triangle? • AA scalene triangle
• BAn equilateral triangle
• CAn isosceles triangle

Q10:

Which of these is an isosceles triangle? • ATriangle A
• BTriangle B