Lesson Worksheet: Types of Triangles: Angles and Sides Mathematics • 5th Grade
In this worksheet, we will practice classifying triangles as isosceles, scalene, or equilateral and as acute, right, or obtuse.
Q5:
Which of the following describes the given shape?
- Aacute triangle
- Bisoceles triangle
- Cright triangle
- Dobtuse triangle
- Eequilateral triangle
Q6:
Which of the following describes the given shape?
- Aobtuse triangle
- Bright triangle
- Cisoceles triangle
- Dequilateral triangle
- Eacute triangle
Q7:
Which of the following describes the given shape?
- Aright triangle
- Bobtuse triangle
- Cisoceles triangle
- Dequilateral triangle
- Escalene triangle
Q8:
True or False: Some right triangles are isosceles.
- ATrue
- BFalse
Q9:
True or False: Some obtuse triangles are isosceles.
- AFalse
- BTrue
Q13:
Describe the triangle using an adjective from the list acute, right, obtuse and the list equilateral, isosceles, scalene.
- Aacute equilateral
- Bacute scalene
- Cobtuse scalene
- Dright scalene
Q14:
True or False: All acute triangles are isosceles.
- ATrue
- BFalse
Q16:
What do these shapes have in common?
- ABoth are isosceles triangles.
- BBoth are acute triangles.
- CBoth are right triangles.
- DBoth are equilateral triangles.
- EBoth are triangles.
Q17:
Which of the following is true of triangle ?
- AAll its angles are acute.
- BIt is a right-angled triangle.
- CIt has an obtuse angle.
Q19:
One of the base angles of an isosceles triangle is . What type of triangle is this?
- Aobtuse angled
- Bequilateral
- Cright angled
- Dacute angled
Q20:
What do these shapes have in common?
- ABoth are isosceles triangles.
- BBoth are right triangles.
- CBoth are acute triangles.
- DBoth are obtuse triangles.
- EBoth are equilateral triangles.
Q21:
What do these shapes have in common?
- ABoth are isosceles triangles.
- BBoth are right triangles.
- CBoth are equilateral triangles.
- DBoth are acute triangles.
- EBoth are obtuse triangles.
Q22:
Two angles in a triangle are and . What kind of triangle is it, in terms of its angles?
- Aacute-angled
- Bright-angled
- Cobtuse -angled
Q23:
Is a scalene, isosceles, or equilateral triangle?
- Ascalene triangle
- Bequilateral triangle
- Cisosceles triangle
Q24:
What do an obtuse isosceles triangle and a right scalene triangle have in common?
- ABoth have no congruent sides.
- BBoth have two acute angles.
- CBoth have two congruent sides.
- DBoth have no acute angles.
Q25:
Liam cut a 30 cm piece of string into three equal parts. Then, he formed a triangle by using each of the parts as one of the triangleβs sides. Which of these types of triangles did he form?
- AAn acute equilateral triangle
- BA right equilateral triangle
- CAn obtuse equilateral triangle
- DAn acute isosceles triangle
- EA right isosceles triangle