The 'Many Triangles' math problem #1 (original) (raw)

In the figure below, the lines BC, AD and FT are parallel. Lines BF, GH and CT are parallel. Press the browser 'refresh' button to clear answers.

Problem 1

How many right triangles are there?

(If you are assuming the angle abk, and the three others like it, is 90° you will need to prove it first).

Problem 2

Problem 3

How many triangles altogether?

Problem 4

What is the total area of the figure?

Resources (and perhaps clues)

• Triangle
• Right triangle
• Isosceles triangle
• Area of a triangle

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