# Worksheet: Types of Triangles: Angles and Sides

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: **

Determine whether this statement is true or false: Some right triangles are isosceles.

- Atrue
- Bfalse

**Q9: **

Determine whether this statement is 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: **

Determine whether this statement is 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