More
figures in a figure
Example 1
How many triangles are there in the given figures?
(i) Solution
A, B, C, D are four triangles.
Combining A & D, B & D and D & C do
not form any triangles.
Combining A, B & D; A, C & D and B, D &
C also do not form any triangles.
Combining A, B, C & D = 1 triangle
Total
number of triangles =
4
+
1
=
5
(ii) Solution
A, B, C, D, & E are five triangles.
No combination of these triangles taken 2 at a time,
form any triangle.
Only the combinations of A, F & C; A, F &
D; B, F & E; B, F & D and C, F & E form triangles when taken 3 triangles
at a time. Hence, the total number of triangles = 5 + 5 = 10.
ICT Corner
INFORMATION PROCESSING
Expected
Result is shown in this picture
Step
– 1
Open
the Browser and copy and paste the Link given below (or) by typing the URL given
(or) Scan the QR Code.
Step
− 2
“Genius
Puzzles” web page will appear. There are many PUZZLES related to the triangle are
present. This page is to find “HOW MANY TRIANGLES ARE THERE” in the given figure.
Step-3
Calculate
your answer and click “View Answer” to check whether your answer is correct for
each puzzle.
Browse in the link
Triangles:
https://gpuzzles.com/quiz/how-many-triangles-are-there-puzzles-with-answers/
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