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Maths · Grade 1 · Set A
What makes a triangle
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Goal: 15 min
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Remember: A triangle has 3 straight sides and is closed all round. Colour, size and tilt do not matter.

Spot the triangle

Count the straight sides.

1
Which shape is a triangle?
A
B
C
2
Which shape is NOT a triangle?
A
B
C
3
How many straight sides does a triangle have?
4
How many sides does this shape have?
5
This shape is a triangle.
TrueFalse
6
A big triangle and a small triangle are both triangles.
TrueFalse
7
Circle every triangle.
A
B
C
D
8
Join each shape to its number of sides.
  1. 1triangle
  2. 2square
  3. 3hexagon
  • A3 sides
  • B6 sides
  • C4 sides
9
Pip cuts off one corner of a triangle. It now has 4 sides. Is it still a triangle?
YesNo
10
Pip turns a triangle upside down. Is it still a triangle?
YesNo
11
Draw a triangle.
12
Tell how you know a shape is a triangle.
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