Well, these puzzles are quite simple.
You just need to count how many triangles are there.
Note: don't peek the answers before trying to solve the puzzle on your own  🙂

Here they are:

• [spoiler=Type 1]

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• [spoiler=Type 2]

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• [spoiler=Type 3]

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• [spoiler=Type 4]

  [spoiler=The answer]There are 64 triangles here. [/spoiler][/spoiler]

• [spoiler=Type 5]

  [/spoiler]

• [spoiler=Type 6]

  [/spoiler]

• [spoiler=Type 7]

  [/spoiler]