Topics
9 Angles, lines, and shapes
topic badge
AustraliaNSW
Stage 4

9.04 Triangles

Lesson
Worksheet
Practice

Interactive practice questions

Select the acute triangle:

A triangle with no tick marks on its sides, indicating that no sides are equal in length. One corner of the triangle has box drawn inside it, indicating a 90 degrees angle.

A

A triangle with no tick marks on its sides, indicating that no sides are equal in length. One of the interior angles measures more than 90° degrees and the other two is less than 90° degrees.

B

A triangle with no tick marks on its sides, indicating that no sides are equal in length. All angles appear to be less than 90 degrees.

C

A triangle with no tick marks on its sides, indicating that no sides are equal in length. One of the interior angles measures more than 90° degrees and the other two is less than 90° degrees.

D
Easy
< 1min

Select the obtuse triangle:

Easy
< 1min

Select the right-angled triangle:

Easy
< 1min

Select the isosceles triangle:

Easy
< 1min
Sign up to access Practice Questions
Get full access to our content with a Mathspace account
Book a Demo
Sign up for free

Outcomes

MA4-17MG

classifies, describes and uses the properties of triangles and quadrilaterals, and determines congruent triangles to find unknown side lengths and angles

What is Mathspace

About Mathspace