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Geometry: How Many Right Angles?

In this worksheet, students state which of the quadrilaterals and triangles shown have right angles (angles of 90 degrees).

'Geometry: How Many Right Angles?' worksheet

Key stage:  KS 2

Year:  Year 4 Maths worksheets

Curriculum topic:   Geometry: Properties of Shapes

Curriculum subtopic:   Identify Acute/Obtuse Angles

Popular topics:   Angles worksheets, Geometry worksheets

Difficulty level:  

Worksheet Overview

This activity is about right angles found in simple shapes.

 

Example

Which of these shapes are quadrilaterals with no right angles.

 

 

Parallelogram
a
Triangle
b
Rectangle
c
Rhombus
d
Trapezoid
e
Triangle
f
Triangle
g
Right-angled triangle
h

 

Answer

Remember that the corner of a rectangular piece of paper is a right angle.  

 

Quadrilaterals have four sides.

Triangles have three sides.

 

So, the quadrilaterals above are shapes a, c, d and e.

The only one of those four quadrilaterals that has right angles is c, which is a rectangle.

 

This means that a, d and e are the quadrilaterals above that have no right angles.

 

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