# Lesson Worksheet: Triangles Mathematics

In this worksheet, we will practice recognizing, describing, and classifying triangles as acute, obtuse, or right and as isosceles, equilateral, or scalene.

Q1:

Which of the following describes the given shape? • Aobtuse triangle
• Bequilateral triangle
• Cright triangle
• Disoceles triangle
• Eacute triangle

Q2:

What type of triangle is this? • ARight triangle
• BIsoceles triangle
• CObtuse triangle
• DEquilateral triangle
• EScalene triangle

Q3:

What type of triangle is this? • AAn acute triangle
• BAn isosceles triangle
• CA right triangle
• DAn obtuse triangle
• EAn equilateral triangle

Q4:

What do these shapes have in common? • ABoth are obtuse triangles.
• BBoth are isosceles triangles.
• CBoth are right triangles.
• DBoth are equilateral triangles.
• EBoth are acute triangles.

Q5:

Which of the following describes the given shape? • Aright triangle
• Bobtuse triangle
• Cisoceles triangle
• Dequilateral triangle
• Escalene triangle

Q6:

Consider the following triangle. Which of these types of triangles is it?

• AAn acute scalene triangle
• BA right isosceles triangle
• CAn obtuse isosceles triangle
• DAn acute isosceles triangle
• EAn obtuse scalene triangle

Q7:

True or False: Some right triangles are isosceles.

• ATrue
• BFalse

Q8:

Ghena and Nouf were each asked to draw a right isosceles triangle with at least one side that is 15 cm long. The triangles they drew are shown below. Who drew her triangle correctly?

• AOnly Ghena
• BOnly Nouf
• CBoth Ghena and Nouf
• DNeither Ghena nor Nouf

Q9:

Hoor drew the triangle shown below. Which of these types of triangles did she draw?

• AAn acute isosceles triangle
• BAn acute scalene triangle
• CAn obtuse scalene triangle
• DA right scalene triangle
• EAn obtuse isosceles triangle

Q10:

True or False: Some obtuse triangles are isosceles.

• AFalse
• BTrue