Episode 4 of 17
A height outside a thin triangle
The question
Work out the area of the shaded triangle.
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Answer
91 cm²
Look
More in this topic
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0:21
Episode 1
The base or the height that goes with it
0:24
Episode 2
Draw the height of the marked base
0:15
Episode 3
A slanting base and its height
0:17
Episode 4 · Now playing
A height outside a thin triangle
0:17
Episode 5
A thin triangle in a rectangle
0:15
Episode 6
A triangle on the side of a square
0:16
Episode 7
Cubes in a corner on the right
0:17
Episode 8
A staircase of cubes and a tower
0:20
Episode 9
The volume of a cube and a cuboid
0:18
Episode 10
Water in a tank, in litres
0:20
Episode 11
Water under an empty part of 8 cm
0:34
Episode 12
A table of cubic centimetres and litres
0:24
Episode 13
Grey and white beads on a bracelet
0:31
Episode 14
Missing numbers in equal ratios
0:26
Episode 15
Boys, girls and teachers at a camp
0:27
Episode 16
Missing numbers in three-term ratios
0:27
Episode 17