Coach John's Math Tools
for primary school maths
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Interactive explorer: a triangle's area is always half of its rectangle
RECTANGLE
W × H
80
÷ 2
TRIANGLE
½ × W × H
40
Triangle = ½ of Rectangle — always!
Width
−
10
+
Height
−
8
+
Triangles
−
1
+
Normal view
Show the halves
Prove it!
speed
2
