Length: 0:29Perimeter of a TriangleAll 3 sides are 7 cm long. What is the perimeter?Grade 4Learning video 64 · Geometry
Splitting Shapes
Watch and solve along: the video pauses when the question comes. Type your answer, then watch the solution.
Read the story
This shape looks like an L. What is its area?
We split it into two rectangles.
The big one is 4 by 2, so 8 squares. The small one is 2 by 3, so 6 squares.
Together that's 14 squares.
3 by 3 squares and 4 by 1 squares: how many in all?
Answer and working
Correct! 9 plus 4 is 13 squares.
9 + 4 = 13
Geometry
Length: 0:29Perimeter of a TriangleAll 3 sides are 7 cm long. What is the perimeter?Grade 4
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