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).

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

Problem 2

How many isosceles triangles are there?

Problem 3

How many triangles altogether?

Problem 4

What is the total area of the figure?

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